prysm-pulse/beacon-chain/state/stategen/cacher.go
kasey 17a43c1158
Retrieving state by slot to always apply canonical block at slot, when available (#10255)
* new stategen.StateReplayer/ReplayerBuilder to give more fine-grained
  control of replaying state+block history
* all rpc/api methods updated to use the new interface, return post-state

Co-authored-by: Kasey Kirkham <kasey@users.noreply.github.com>
Co-authored-by: Radosław Kapka <rkapka@wp.pl>
Co-authored-by: terence tsao <terence@prysmaticlabs.com>
2022-03-09 13:33:18 -06:00

33 lines
626 B
Go

package stategen
import (
"github.com/pkg/errors"
"github.com/prysmaticlabs/prysm/beacon-chain/state"
)
var ErrNotInCache = errors.New("state not found in cache")
type CachedGetter interface {
ByRoot([32]byte) (state.BeaconState, error)
}
type CombinedCache struct {
getters []CachedGetter
}
func (c CombinedCache) ByRoot(root [32]byte) (state.BeaconState, error) {
for _, getter := range c.getters {
st, err := getter.ByRoot(root)
if err == nil {
return st, nil
}
if errors.Is(err, ErrNotInCache) {
continue
}
return nil, err
}
return nil, ErrNotInCache
}
var _ CachedGetter = &CombinedCache{}