prysm-pulse/beacon-chain/state/stategen/getter.go

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package stategen
import (
"context"
"github.com/pkg/errors"
"github.com/prysmaticlabs/prysm/beacon-chain/state"
"go.opencensus.io/trace"
)
// StateByRoot retrieves the state from DB using input block root.
// It retrieves state from the hot section if the state summary slot
// is below the split point cut off.
func (s *State) StateByRoot(ctx context.Context, blockRoot [32]byte) (*state.BeaconState, error) {
ctx, span := trace.StartSpan(ctx, "stateGen.StateByRoot")
defer span.End()
summary, err := s.beaconDB.StateSummary(ctx, blockRoot)
if err != nil {
return nil, errors.Wrap(err, "could not get state summary")
}
if summary.Slot < s.splitInfo.slot {
return s.loadColdStateByRoot(ctx, blockRoot)
}
return s.loadHotStateByRoot(ctx, blockRoot)
}
// StateBySlot retrieves the state from DB using input slot.
// It retrieves state from the cold section if the input slot
// is below the split point cut off.
// Note: `StateByRoot` is preferred over this. Retrieving state
// by root `StateByRoot` is more performant than retrieving by slot.
func (s *State) StateBySlot(ctx context.Context, slot uint64) (*state.BeaconState, error) {
ctx, span := trace.StartSpan(ctx, "stateGen.StateBySlot")
defer span.End()
if slot < s.splitInfo.slot {
return s.loadColdIntermediateStateBySlot(ctx, slot)
}
return s.loadHotStateBySlot(ctx, slot)
}