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Check seed before shuffle (#5841)

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terence tsao 2020-05-13 14:25:36 -07:00 committed by GitHub
parent ffa08f5a85
commit 8ce01acbcf
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 7 deletions
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14
beacon-chain/core/helpers/committee.go
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@ -298,13 +298,6 @@ func ShuffledIndices(state *stateTrie.BeaconState, epoch uint64) ([]uint64, erro
// list with committee index and epoch number. It caches the shuffled indices for current epoch and next epoch.
func UpdateCommitteeCache(state *stateTrie.BeaconState, epoch uint64) error {
for _, e := range []uint64{epoch, epoch + 1} {
shuffledIndices, err := ShuffledIndices(state, e)
if err != nil {
return err
}
count := SlotCommitteeCount(uint64(len(shuffledIndices)))
seed, err := Seed(state, e, params.BeaconConfig().DomainBeaconAttester)
if err != nil {
return err
@ -313,6 +306,13 @@ func UpdateCommitteeCache(state *stateTrie.BeaconState, epoch uint64) error {
return nil
}
shuffledIndices, err := ShuffledIndices(state, e)
if err != nil {
return err
}
count := SlotCommitteeCount(uint64(len(shuffledIndices)))
// Store the sorted indices as well as shuffled indices. In current spec,
// sorted indices is required to retrieve proposer index. This is also
// used for failing verify signature fallback.