prysm-pulse/beacon-chain/sync/genesis/file.go
terencechain d17996f8b0
Update to V4 🚀 (#12134)
* Update V3 from V4

* Fix build v3 -> v4

* Update ssz

* Update beacon_chain.pb.go

* Fix formatter import

* Update update-mockgen.sh comment to v4

* Fix conflicts. Pass build and tests

* Fix test
2023-03-17 18:52:56 +00:00

60 lines
1.9 KiB
Go

package genesis
import (
"context"
"fmt"
"os"
"github.com/prysmaticlabs/prysm/v4/io/file"
"github.com/pkg/errors"
"github.com/prysmaticlabs/prysm/v4/beacon-chain/db"
)
// Initializer describes a type that is able to obtain the checkpoint sync data (BeaconState and SignedBeaconBlock)
// in some way and perform database setup to prepare the beacon node for syncing from the given checkpoint.
// See FileInitializer and APIInitializer.
type Initializer interface {
Initialize(ctx context.Context, d db.Database) error
}
// NewFileInitializer validates the given path information and creates an Initializer which will
// use the provided state and block files to prepare the node for checkpoint sync.
func NewFileInitializer(statePath string) (*FileInitializer, error) {
var err error
if err = existsAndIsFile(statePath); err != nil {
return nil, err
}
// stat just to make sure it actually exists and is a file
return &FileInitializer{statePath: statePath}, nil
}
// FileInitializer initializes a beacon-node database genesis state and block
// using ssz-encoded state data stored in files on the local filesystem.
type FileInitializer struct {
statePath string
}
// Initialize is called in the BeaconNode db startup code if an Initializer is present.
// Initialize prepares the beacondb using the provided genesis state.
func (fi *FileInitializer) Initialize(ctx context.Context, d db.Database) error {
serState, err := file.ReadFileAsBytes(fi.statePath)
if err != nil {
return errors.Wrapf(err, "error reading state file %s for checkpoint sync init", fi.statePath)
}
return d.LoadGenesis(ctx, serState)
}
var _ Initializer = &FileInitializer{}
func existsAndIsFile(path string) error {
info, err := os.Stat(path)
if err != nil {
return errors.Wrapf(err, "error checking existence of ssz-encoded file %s for genesis state init", path)
}
if info.IsDir() {
return fmt.Errorf("%s is a directory, please specify full path to file", path)
}
return nil
}