Trait SnapAttemptStore 

pub trait SnapAttemptStore {
    // Required methods
    fn start_snap_attempt(
        &self,
        generation: SnapGeneration,
    ) -> Result<SnapWrite, SnapSyncError>;
    fn active_snap_write(&self) -> Result<Option<SnapWrite>, SnapSyncError>;
    fn authorize_snap_write(
        &self,
        write: SnapWrite,
    ) -> Result<SnapAttempt, SnapSyncError>;
    fn advance_snap_pivot(
        &self,
        write: SnapWrite,
        generation: SnapGeneration,
    ) -> Result<SnapWrite, SnapSyncError>;
    fn verify_snap_attempt(&self, write: SnapWrite) -> Result<(), SnapSyncError>;
    fn abandon_snap_attempt(&self) -> Result<(), SnapSyncError>;
}

Persistence for the attempt that owns downloaded snap state.

Blanket-implemented over node metadata access, so these writes join the caller’s transaction: state, bytecode and the attempt record commit together or not at all.

Required Methods

fn start_snap_attempt( &self, generation: SnapGeneration, ) -> Result<SnapWrite, SnapSyncError>

Starts an attempt anchored to generation, superseding any already recorded.

fn active_snap_write(&self) -> Result<Option<SnapWrite>, SnapSyncError>

Returns the write an unfinished attempt accepts, if one owns the persisted state.

fn authorize_snap_write( &self, write: SnapWrite, ) -> Result<SnapAttempt, SnapSyncError>

Returns the attempt when write still owns the persisted state, rejecting it otherwise.

fn advance_snap_pivot( &self, write: SnapWrite, generation: SnapGeneration, ) -> Result<SnapWrite, SnapSyncError>

Re-anchors the attempt to generation, refusing writes proved against the previous root.

fn verify_snap_attempt(&self, write: SnapWrite) -> Result<(), SnapSyncError>

Marks the attempt’s downloaded state verified.

fn abandon_snap_attempt(&self) -> Result<(), SnapSyncError>

Gives up on an unfinished attempt, refusing its outstanding writes.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<T> SnapAttemptStore for T

where T: MetadataProvider + MetadataWriter,