# Module ethcore::snapshot [−] [src]

Snapshot creation, restoration, and network service.

Documentation of the format can be found at https://github.com/ethcore/parity/wiki/%22PV64%22-Snapshot-Format

## Reexports

`pub use self::service::{Service, DatabaseRestore};`

## Modules

io | Snapshot i/o. Ways of writing and reading snapshots. This module supports writing and reading snapshots of two different formats: packed and loose. Packed snapshots are written to a single file, and loose snapshots are written to multiple files in one directory.
service | Snapshot network service implementation.

## Structs

BlockRebuilder | Rebuilds the blockchain from chunks.
ManifestData | Manifest data.
Progress | A progress indicator for snapshots.
StateRebuilder | Used to rebuild the state trie piece by piece.
Watcher | A `ChainNotify` implementation which will trigger a snapshot event at certain block numbers.

## Enums

Error | Snapshot-related errors.
RestorationStatus | Statuses for restorations.

## Traits

SnapshotService | The interface for a snapshot network service. This handles: - restoration of snapshots to temporary databases. - responding to queries for snapshot manifests and chunks

## Functions

chunk_blocks | Create and write out all block chunks to disk, returning a vector of all the hashes of block chunks created.
chunk_state | Walk the given state database starting from the given root, creating chunks and writing them out.
take_snapshot | Take a snapshot using the given blockchain, starting block hash, and database, writing into the given writer.
verify_old_block | Verify an old block with the given header, engine, blockchain, body. If `always` is set, it will perform the fullest verification possible. If not, it will take a random sample to determine whether it will do heavy or light verification.

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