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drand: fix beacon cache

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This commit is contained in:
Łukasz Magiera 2021-04-30 09:35:38 +02:00
parent eb10918470
commit ab811e2e19
1 changed files with 5 additions and 2 deletions
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7
chain/beacon/drand/drand.go
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@ -168,8 +168,8 @@ func (db *DrandBeacon) getCachedValue(round uint64) *types.BeaconEntry {
if !ok { if !ok {
return nil return nil
} }
e, _ := v.(*types.BeaconEntry) e, _ := v.(types.BeaconEntry)
return e return &e
} }
func (db *DrandBeacon) VerifyEntry(curr types.BeaconEntry, prev types.BeaconEntry) error { func (db *DrandBeacon) VerifyEntry(curr types.BeaconEntry, prev types.BeaconEntry) error {
@ -178,6 +178,9 @@ func (db *DrandBeacon) VerifyEntry(curr types.BeaconEntry, prev types.BeaconEntr
return nil return nil
} }
if be := db.getCachedValue(curr.Round); be != nil { if be := db.getCachedValue(curr.Round); be != nil {
if !bytes.Equal(curr.Data, be.Data) {
return xerrors.New("invalid beacon value, does not match cached good value")
}
// return no error if the value is in the cache already // return no error if the value is in the cache already
return nil return nil
} }