Struct DbRoot 

pub struct DbRoot {
    pub format_version: u32,
    pub lease_version: u64,
    pub owner: String,
    pub lease_expires_unix_ms: i64,
    pub owner_endpoint: String,
    pub index_basis_t: u64,
    pub roots: Option<[BlobId; 4]>,
}

Published durable index-root metadata carrying the write lease (see docs/design/log-and-transactor.md).

The lease fields and the index fields live in one record on purpose: every mutation — lease acquisition, renewal, release, index publication — is a CAS on these bytes, so a writer whose ownership has changed hands always fails its next CAS and can never install a root. No cross-record atomicity is required of the store.

Fields

format_version: u32

On-disk format version. Readers reject roots from newer formats.

lease_version: u64

Fencing version; increments on every change of lease ownership.

owner: String

Owning transactor id; empty when the lease has never been acquired under format 2.

lease_expires_unix_ms: i64

Lease expiry as Unix milliseconds; 0 when released/never held.

owner_endpoint: String

Client endpoint advertised by the owner (for peer lease-holder rediscovery); empty when the owner does not advertise one.

index_basis_t: u64

Highest indexed transaction.

roots: Option<[BlobId; 4]>

EAVT, AEVT, AVET, and VAET blob ids; None before the first index publication (a bare fence bump).

Implementations

impl DbRoot

pub fn encode(&self) -> Vec<u8>

Encodes the root for the root store.

pub fn decode(bytes: &[u8]) -> Option<DbRoot>

Decodes stored root bytes (any format up to FORMAT_VERSION; newer formats still yield their fence fields so old binaries fence correctly, and callers reject them via format_version).

Trait Implementations

impl Clone for DbRoot

fn clone(&self) -> DbRoot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DbRoot

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

Formats the value using the given formatter.

impl Eq for DbRoot

impl PartialEq for DbRoot

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DbRoot