Struct ConsensusWal 

pub struct ConsensusWal { /* private fields */ }

Write-Ahead Log for consensus commit operations.

Provides crash recovery by recording commit intent before executing blocks and commit-done after persisting state. On restart, if a CommitIntent without a matching CommitDone is found, the node knows a mid-commit crash occurred and can re-execute from the block store.

Implementations

impl ConsensusWal

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

Open or create the WAL file in the given data directory.

pub fn check_recovery(data_dir: &Path) -> Result<WalRecovery>

Check the WAL for incomplete commits (called on startup).

pub fn log_commit_intent(&mut self, target_height: Height) -> Result<()>

Record that a commit batch is about to start.

pub fn log_commit_done(&mut self, target_height: Height) -> Result<()>

Record that a commit batch completed successfully.

Trait Implementations

impl Wal for ConsensusWal

The WAL struct implements hotmint_consensus::Wal.

fn log_commit_intent(&mut self, target_height: Height) -> Result<()>

Log intent to commit blocks up to target_height. Must fsync before returning.

fn log_commit_done(&mut self, target_height: Height) -> Result<()>

Log that commit succeeded. May truncate the WAL.