Trait zcash_history::Version

pub trait Version {
    type NodeData: Debug;

    fn consensus_branch_id(data: &Self::NodeData) -> u32;
    fn start_height(data: &Self::NodeData) -> u64;
    fn end_height(data: &Self::NodeData) -> u64;
    fn combine_inner(
        subtree_commitment: [u8; 32], 
        left: &Self::NodeData, 
        right: &Self::NodeData
    ) -> Self::NodeData;
    fn read<R: Read>(
        consensus_branch_id: u32, 
        r: &mut R
    ) -> Result<Self::NodeData>;
    fn write<W: Write>(data: &Self::NodeData, w: &mut W) -> Result<()>;

    fn combine(left: &Self::NodeData, right: &Self::NodeData) -> Self::NodeData { ... }
    fn to_bytes(data: &Self::NodeData) -> Vec<u8> { ... }
    fn from_bytes<T: AsRef<[u8]>>(
        consensus_branch_id: u32, 
        buf: T
    ) -> Result<Self::NodeData> { ... }
    fn hash(data: &Self::NodeData) -> [u8; 32] { ... }
}

A version of the chain history tree.

Required Associated Types

type NodeData: Debug

The node data for this tree version.

Required Methods

fn consensus_branch_id(data: &Self::NodeData) -> u32

Returns the consensus branch ID for the given node data.

fn start_height(data: &Self::NodeData) -> u64

Returns the start height for the given node data.

fn end_height(data: &Self::NodeData) -> u64

Returns the end height for the given node data.

fn combine_inner(
    subtree_commitment: [u8; 32],
    left: &Self::NodeData,
    right: &Self::NodeData
) -> Self::NodeData

Combines two nodes metadata.

For internal use.

fn read<R: Read>(consensus_branch_id: u32, r: &mut R) -> Result<Self::NodeData>

Parses node data from the given reader.

fn write<W: Write>(data: &Self::NodeData, w: &mut W) -> Result<()>

Writes the byte representation of the given node data to the given writer.

Provided Methods

fn combine(left: &Self::NodeData, right: &Self::NodeData) -> Self::NodeData

Combines two nodes’ metadata.

fn to_bytes(data: &Self::NodeData) -> Vec<u8>

Converts to byte representation.

fn from_bytes<T: AsRef<[u8]>>(
    consensus_branch_id: u32,
    buf: T
) -> Result<Self::NodeData>

Convert from byte representation.

fn hash(data: &Self::NodeData) -> [u8; 32]

Hash node metadata

Implementors

impl Version for V1

type NodeData = NodeData

impl Version for V2

type NodeData = V2