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file.go
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file.go
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package checkpoint
import (
"context"
"fmt"
"os"
"github.com/pkg/errors"
"github.com/prysmaticlabs/prysm/v3/beacon-chain/db"
"github.com/prysmaticlabs/prysm/v3/config/params"
"github.com/prysmaticlabs/prysm/v3/io/file"
log "github.com/sirupsen/logrus"
)
// 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(blockPath string, statePath string) (*FileInitializer, error) {
var err error
if err = existsAndIsFile(blockPath); err != nil {
return nil, err
}
if err = existsAndIsFile(statePath); err != nil {
return nil, err
}
// stat just to make sure it actually exists and is a file
return &FileInitializer{blockPath: blockPath, statePath: statePath}, nil
}
// FileInitializer initializes a beacon-node database to use checkpoint sync,
// using ssz-encoded block and state data stored in files on the local filesystem.
type FileInitializer struct {
blockPath string
statePath string
}
// Initialize is called in the BeaconNode db startup code if an Initializer is present.
// Initialize does what is needed to prepare the beacon node database for syncing from the weak subjectivity checkpoint.
func (fi *FileInitializer) Initialize(ctx context.Context, d db.Database) error {
origin, err := d.OriginCheckpointBlockRoot(ctx)
if err == nil && origin != params.BeaconConfig().ZeroHash {
log.Warnf("origin checkpoint root %#x found in db, ignoring checkpoint sync flags", origin)
return nil
} else {
if !errors.Is(err, db.ErrNotFound) {
return errors.Wrap(err, "error while checking database for origin root")
}
}
serBlock, err := file.ReadFileAsBytes(fi.blockPath)
if err != nil {
return errors.Wrapf(err, "error reading block file %s for checkpoint sync init", fi.blockPath)
}
serState, err := file.ReadFileAsBytes(fi.statePath)
if err != nil {
return errors.Wrapf(err, "error reading state file %s for checkpoint sync init", fi.blockPath)
}
return d.SaveOrigin(ctx, serState, serBlock)
}
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 checkpoint sync init", path)
}
if info.IsDir() {
return fmt.Errorf("%s is a directory, please specify full path to file", path)
}
return nil
}