prysm-pulse/beacon-chain/sync/checkpoint/api.go
kasey a1a12243be
Sync from finalized (#10723)
* checkpoint sync use finalized state+block

instead of finding the block at the beginning of the weak subjectivity
epoch.

* happy path test for sync-from-finalized

* gofmt

* functional opts for the minimal e2e

* add TestCheckpointSync option

* wip: pushing for CI

* include conn index in log for debugging

* lint

* block until regular sync test finishes

* restore TestSync->testDoppelGangerProtection link

* update bazel deps for all the test targets

* updating to match current checksum from github

Co-authored-by: Kasey Kirkham <kasey@users.noreply.github.com>
2022-05-25 22:52:43 +00:00

36 lines
1.2 KiB
Go

package checkpoint
import (
"context"
"github.com/pkg/errors"
"github.com/prysmaticlabs/prysm/api/client/beacon"
"github.com/prysmaticlabs/prysm/beacon-chain/db"
)
// APIInitializer manages initializing the beacon node using checkpoint sync, retrieving the checkpoint state and root
// from the remote beacon node api.
type APIInitializer struct {
c *beacon.Client
}
// NewAPIInitializer creates an APIInitializer, handling the set up of a beacon node api client
// using the provided host string.
func NewAPIInitializer(beaconNodeHost string) (*APIInitializer, error) {
c, err := beacon.NewClient(beaconNodeHost)
if err != nil {
return nil, errors.Wrapf(err, "unable to parse beacon node url or hostname - %s", beaconNodeHost)
}
return &APIInitializer{c: c}, nil
}
// Initialize downloads origin state and block for checkpoint sync and initializes database records to
// prepare the node to begin syncing from that point.
func (dl *APIInitializer) Initialize(ctx context.Context, d db.Database) error {
od, err := beacon.DownloadFinalizedData(ctx, dl.c)
if err != nil {
return errors.Wrap(err, "Error retrieving checkpoint origin state and block")
}
return d.SaveOrigin(ctx, od.StateBytes(), od.BlockBytes())
}