[blockchain] Do not rely on beaconchain for when not on shard0, use shardchain (#1840)

node/worker/worker.go

@@ -290,26 +290,26 @@ func (w *Worker) SuperCommitteeForNextEpoch(
 		nextCommittee shard.State
 		oops          error
 	)
-
-	switch shardID {
-	case shard.BeaconChainShardID:
-		if shard.Schedule.IsLastBlock(w.current.header.Number().Uint64()) {
-			nextCommittee, oops = committee.WithStakingEnabled.Compute(
-				new(big.Int).Add(w.current.header.Epoch(), common.Big1),
-				*w.config,
-				beacon,
-			)
-		}
-	default:
-		// WARN When we first enable staking, this condition may not be robust by itself.
-		switch beacon.CurrentHeader().Epoch().Cmp(w.current.header.Epoch()) {
-		case 1:
-			nextCommittee, oops = committee.WithStakingEnabled.ReadFromDB(
-				beacon.CurrentHeader().Epoch(), beacon,
-			)
-		}
-
+	// WARN This currently not working and breaks around 15 block
+	// switch shardID {
+	// case shard.BeaconChainShardID:
+	if shard.Schedule.IsLastBlock(w.current.header.Number().Uint64()) {
+		nextCommittee, oops = committee.WithStakingEnabled.Compute(
+			new(big.Int).Add(w.current.header.Epoch(), common.Big1),
+			*w.config,
+			beacon,
+		)
 	}
+	// default:
+	// WARN When we first enable staking, this condition may not be robust by itself.
+	// 	switch beacon.CurrentHeader().Epoch().Cmp(w.current.header.Epoch()) {
+	// 	case 1:
+	// 		nextCommittee, oops = committee.WithStakingEnabled.ReadFromDB(
+	// 			beacon.CurrentHeader().Epoch(), beacon,
+	// 		)
+	// 	}
+
+	// }
 	return nextCommittee, oops
 }