Struct Node 

pub struct Node { /* private fields */ }

A node in the DAG containing a transaction or consensus message

Examples

use qudag_dag::{Node, NodeState};

// Create a new node with payload and no parents (genesis node)
let payload = b"Hello, DAG!".to_vec();
let node = Node::new(payload.clone(), vec![]);

assert_eq!(node.payload(), &payload);
assert_eq!(node.state(), NodeState::Pending);
assert!(node.parents().is_empty());

// Hash is computed deterministically
let hash = node.hash();
assert_eq!(hash.as_bytes().len(), 32);

Implementations

impl Node

pub fn new(payload: Vec<u8>, parents: Vec<Hash>) -> Node

Creates a new node with the given payload and parents

Examples

use qudag_dag::Node;

// Create a genesis node (no parents)
let payload = b"Genesis block".to_vec();
let node = Node::new(payload, vec![]);

// Create a child node
let parent_hash = node.hash();
let child_payload = b"Child block".to_vec();
let child_node = Node::new(child_payload, vec![parent_hash]);

pub fn hash(&self) -> Hash

Returns the node’s unique hash

pub fn payload(&self) -> &[u8]

Returns reference to node’s payload

pub fn state(&self) -> NodeState

Returns current state of the node

pub fn parents(&self) -> Vec<Hash>

Returns reference to parent hashes (converted)

pub fn update_state(&mut self, new_state: NodeState) -> Result<(), DagError>

Updates node state if transition is valid

Trait Implementations

impl Clone for Node

fn clone(&self) -> Node

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Node

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Node

fn deserialize<__D>( __deserializer: __D, ) -> Result<Node, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Node

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

where __S: Serializer,

Serialize this value into the given Serde serializer.