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Short circuit genesis condition for new state mgmt (#5223)

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* Fixed a regression. Genesis case for state gen

* Comment

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
This commit is contained in:
terence tsao 2020-03-26 12:13:45 -07:00 committed by GitHub
parent 93e68db5e6
commit 5e2faf1a9d
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1 changed files with 6 additions and 0 deletions
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6
beacon-chain/state/stategen/getter.go
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@ -5,6 +5,7 @@ import (
"github.com/pkg/errors"
"github.com/prysmaticlabs/prysm/beacon-chain/state"
"github.com/prysmaticlabs/prysm/shared/params"
"go.opencensus.io/trace"
)
@ -15,6 +16,11 @@ func (s *State) StateByRoot(ctx context.Context, blockRoot [32]byte) (*state.Bea
ctx, span := trace.StartSpan(ctx, "stateGen.StateByRoot")
defer span.End()
// Genesis case. If block root is zero hash, short circuit to use genesis state stored in DB.
if blockRoot == params.BeaconConfig().ZeroHash {
return s.beaconDB.State(ctx, blockRoot)
}
slot, err := s.blockRootSlot(ctx, blockRoot)
if err != nil {
return nil, errors.Wrap(err, "could not get state summary")