Struct WalReader 

pub struct WalReader { /* private fields */ }

Sequential WAL reader.

Implementations

impl WalReader

pub fn open(path: &Path) -> Result<Self>

Open a WAL file for reading.

If the file begins with a valid WALP preamble (16 bytes), it is consumed and stored for use as AAD during decryption. Files without a preamble (unencrypted segments) start reading from offset 0 directly.

Automatically opens the companion double-write buffer file (*.dwb) if it exists alongside the WAL file.

pub fn segment_preamble(&self) -> Option<&SegmentPreamble>

The preamble read from this segment file, if present.

Returns None for unencrypted segments (no preamble written).

pub fn next_record(&mut self) -> Result<Option<WalRecord>>

Read the next record from the WAL.

Returns None at EOF (clean end) or at the first corruption point. Returns Err only for I/O errors or unknown required record types.

pub fn records(self) -> WalRecordIter

Iterator over all valid records in the WAL.

pub fn offset(&self) -> u64

Current read offset in the file.