Struct grin_chain::txhashset::RewindableKernelView

pub struct RewindableKernelView<'a> { /* fields omitted */ }

Rewindable (but readonly) view of the kernel set (based on kernel MMR).

Methods

impl<'a> RewindableKernelView<'a>

pub fn new(     pmmr: RewindablePMMR<'a, TxKernel, PMMRBackend<TxKernel>>,     batch: &'a Batch,     header: BlockHeader ) -> RewindableKernelView<'a>

Build a new readonly kernel view.

pub fn batch(&self) -> &'a Batch

Accessor for the batch used in this view. We will discard this batch (rollback) at the end, so be aware of this. Nothing will get written to the db/index via this view.

pub fn rewind(&mut self, header: &BlockHeader) -> Result<(), Error>

Rewind this readonly view to a previous block. We accomplish this in a readonly way because we can rewind the PMMR via last_pos, without rewinding the underlying backend files.

pub fn validate_root(&self) -> Result<(), Error>

Special handling to make sure the whole kernel set matches each of its roots in each block header, without truncation. We go back header by header, rewind and check each root. This fixes a potential weakness in fast sync where a reorg past the horizon could allow a whole rewrite of the kernel set.