prysm-pulse/beacon-chain/db/errors.go

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package db
import "github.com/prysmaticlabs/prysm/beacon-chain/db/kv"
// 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 ErrNotFound = kv.ErrNotFound
// ErrNotFoundState wraps ErrNotFound for an error specific to a state not being found in the database.
var ErrNotFoundState = kv.ErrNotFoundState
// ErrNotFoundOriginBlockRoot wraps ErrNotFound for an error specific to the origin block root.
var ErrNotFoundOriginBlockRoot = kv.ErrNotFoundOriginBlockRoot
// ErrNotFoundOriginBlockRoot wraps ErrNotFound for an error specific to the origin block root.
var ErrNotFoundBackfillBlockRoot = kv.ErrNotFoundBackfillBlockRoot
// ErrNotFoundGenesisBlockRoot means no genesis block root was found, indicating the db was not initialized with genesis
var ErrNotFoundGenesisBlockRoot = kv.ErrNotFoundGenesisBlockRoot