Struct DeltaPayload 

pub struct DeltaPayload {
    pub id: [u8; 32],
    pub parents: Vec<[u8; 32]>,
    pub payload: Vec<u8>,
    pub hlc_timestamp: u64,
    pub expected_root_hash: [u8; 32],
}

A delta payload for transport.

Contains the delta data and metadata needed for application.

Fields

id: [u8; 32]

Unique delta ID (content hash).

parents: Vec<[u8; 32]>

Parent delta IDs (for causal ordering).

payload: Vec<u8>

Serialized delta operations (Borsh-encoded).

hlc_timestamp: u64

HLC timestamp when the delta was created.

expected_root_hash: [u8; 32]

Expected root hash after applying this delta.

This hash is captured by the originating node at delta creation time. It serves two purposes:

1. Linear history: When deltas are applied in sequence without concurrent branches, receivers can verify they reach the same state.
2. DAG consistency: When concurrent deltas exist, this hash ensures nodes build identical DAG structures even if their local root hashes differ due to different merge ordering. The hash reflects the originator’s state, not a universal truth.

Verification strategy: Compare against this hash only when applying deltas from a single linear chain. For concurrent/merged deltas, use the Merkle tree reconciliation protocol instead.

Implementations

impl DeltaPayload

pub fn is_genesis(&self) -> bool

Check if this delta has no parents (genesis delta).

Trait Implementations

impl BorshDeserialize for DeltaPayload

fn deserialize_reader<__R: Read>(reader: &mut __R) -> Result<Self, Error>

fn deserialize(buf: &mut &[u8]) -> Result<Self, Error>

Deserializes this instance from a given slice of bytes. Updates the buffer to point at the remaining bytes.

fn try_from_slice(v: &[u8]) -> Result<Self, Error>

Deserialize this instance from a slice of bytes.

fn try_from_reader<R>(reader: &mut R) -> Result<Self, Error>

where R: Read,

impl BorshSerialize for DeltaPayload

fn serialize<__W: Write>(&self, writer: &mut __W) -> Result<(), Error>

impl Clone for DeltaPayload

fn clone(&self) -> DeltaPayload

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DeltaPayload

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

Formats the value using the given formatter.

impl PartialEq for DeltaPayload

fn eq(&self, other: &DeltaPayload) -> 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 StructuralPartialEq for DeltaPayload