Struct ledger_kv::Metadata

pub struct Metadata {
    pub file_name: String,
    pub file_path: PathBuf,
    pub num_entries: u64,
    pub last_offset: usize,
    pub parent_hash: Vec<u8>,
}

Struct representing the metadata of the ledger.

Fields

file_name: String

The name of the file associated with the metadata.

file_path: PathBuf

The path where the file is located.

num_entries: u64

The number of entries in the ledger.

last_offset: usize

The last offset in the file.

parent_hash: Vec<u8>

The hash of the parent metadata.

Implementations

impl Metadata

pub fn new(data_dir: PathBuf, description: &str) -> Self

Creates a new instance of Metadata.

Arguments

• data_dir - The directory where the data is stored.
• description - A description for the metadata.

Returns

A new instance of Metadata.

pub fn save(&self)

Saves the metadata to a file.

pub fn refresh(&mut self)

Refreshes the metadata by reading from the file.

Trait Implementations

impl BorshDeserialize for Metadata

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 Metadata

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

impl Clone for Metadata

fn clone(&self) -> Metadata

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Metadata

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

Formats the value using the given formatter.