db

Documentation

Overview

Package db defines the ability to create a new database for an Ethereum Beacon Node.

Index

• Variables
• func IsNotFound(err error) bool
• func NewFileName(dirPath string) string
• func Restore(cliCtx *cli.Context) error
• type Database
• type HeadAccessDatabase
• type NoHeadAccessDatabase
• type ReadOnlyDatabase
• type SlasherDatabase

Variables

var ErrExistingGenesisState = iface.ErrExistingGenesisState

ErrExistingGenesisState is an error when the user attempts to save a different genesis state when one already exists in a database.

var ErrNotFound = kv.ErrNotFound

ErrNotFound can be used to determine if an error from a method in the database package represents a "not found" error. These often require different handling than a low-level i/o error. This variable copies the value in the kv package to the same scope as the Database interfaces, so that it is available to code paths that do not interact directly with the kv package.

var ErrNotFoundOriginBlockRoot = kv.ErrNotFoundOriginBlockRoot

ErrNotFoundOriginBlockRoot wraps ErrNotFound for an error specific to the origin block root.

var ErrNotFoundState = kv.ErrNotFoundState

ErrNotFoundState wraps ErrNotFound for an error specific to a state not being found in the database.

Functions

func IsNotFound

func IsNotFound(err error) bool

IsNotFound allows callers to treat errors from a flat-file database, where the file record is missing, as equivalent to db.ErrNotFound.

func NewFileName

func NewFileName(dirPath string) string

NewFileName uses the KVStoreDatafilePath so that if this layer of indirection between db.NewDB->kv.NewKVStore ever changes, it will be easy to remember to also change this filename indirection at the same time.

func Restore

func Restore(cliCtx *cli.Context) error

Restore a beacon chain database.

Types

type Database

type Database = iface.Database

Database defines the necessary methods for Prysm's Ethereum backend which may be implemented by any key-value or relational database in practice. This is the full database interface which should not be used often. Prefer a more restrictive interface in this package.

type HeadAccessDatabase

type HeadAccessDatabase = iface.HeadAccessDatabase

HeadAccessDatabase exposes Prysm's Ethereum backend for read/write access with information about chain head information. This interface should be used sparingly as the HeadFetcher is the source of truth around chain head information while this interface serves as persistent storage for the head fetcher.

See github.com/prysmaticlabs/prysm/blockchain.HeadFetcher

type NoHeadAccessDatabase

type NoHeadAccessDatabase = iface.NoHeadAccessDatabase

NoHeadAccessDatabase exposes Prysm's Ethereum data backend for read/write access, no information about head info. For head info, use github.com/prysmaticlabs/prysm/blockchain.HeadFetcher.

type ReadOnlyDatabase

type ReadOnlyDatabase = iface.ReadOnlyDatabase

ReadOnlyDatabase exposes Prysm's Ethereum data backend for read access only, no information about head info. For head info, use github.com/prysmaticlabs/prysm/blockchain.HeadFetcher.

type SlasherDatabase

type SlasherDatabase = iface.SlasherDatabase

SlasherDatabase defines necessary methods for Prysm's slasher implementation.