Struct LeafNode

pub struct LeafNode {
    pub hash: Hash,
    pub is_left_sibling: bool,
    pub value: Hash,
    pub label: Hash,
    pub next: Hash,
}

Represents a leaf node in the indexed Merkle Tree.

Leaf nodes contain the actual data stored in the tree structure as well as metadata that, among other things, ensures the integrity and order of the tree structure. Each leaf node contains a hash of its metadata consisting of a SHA256 value, a link to neighboring elements for efficient traversal and verification. The links lead to the label field which is also a SHA256 value, making it sortable, which is crucial for e.g. Non-Membership proofs. For more information see https://eprint.iacr.org/2021/1263.pdf.

Fields:

• hash: The hash of the values below, expect of the is_left_sibling-value.
• is_left_sibling: Indicates if this node is a left child in its parent node.
• value: The actual data value stored in the node.
• label: A unique identifier for the node. This is used to sort by size and to link nodes together.
• next: A reference to the next node in the tree.

Fields

hash: Hash

is_left_sibling: bool

value: Hash

label: Hash

next: Hash

Implementations

impl LeafNode

pub fn new(is_left: bool, label: Hash, value: Hash, next: Hash) -> Self

Initializes a new leaf node with the specified properties.

This function creates a leaf node with above defined attributes. The hash is generated based on its label, value, and next pointer. Additionally, the node is marked as a left sibling or not.

Arguments

• is_left - Boolean indicating if this is a left sibling.
• label - Unique 256 bit identifier for the leaf.
• value - 256 Bit data value of the leaf.
• next - Reference to the next largest node (identified by the label value) in the sequence.

Returns

• A new leaf node with the specified properties.

pub fn is_active(&self) -> bool

Trait Implementations

impl Clone for LeafNode

fn clone(&self) -> LeafNode

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LeafNode

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

Formats the value using the given formatter.

impl Default for LeafNode

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for LeafNode

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for LeafNode

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for LeafNode

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for LeafNode

impl StructuralPartialEq for LeafNode