[sync] fix error of cross-shard transaction

api/service/legacysync/syncing.go

@@ -813,7 +813,7 @@ func (ss *StateSync) UpdateBlockAndStatus(block *types.Block, bc *core.BlockChai
 		// Verify signature every 100 blocks
 		verifySeal := block.NumberU64()%verifyHeaderBatchSize == 0 || verifyAllSig
 		verifyCurrentSig := verifyAllSig && verifySeal
-		if haveCurrentSig {
+		if verifyCurrentSig {
 			sig, bitmap, err := chain.ParseCommitSigAndBitmap(block.GetCurrentCommitSig())
 			if err != nil {
 				return errors.Wrap(err, "parse commitSigAndBitmap")

internal/chain/engine.go

@@ -418,7 +418,7 @@ func (e *engineImpl) verifyHeaderSignature(chain engine.ChainReader, header *blo
 	if err != nil {
 		return err
 	}
-	shardComm, err := ss.FindCommitteeByID(chain.ShardID())
+	shardComm, err := ss.FindCommitteeByID(header.ShardID())
 	if err != nil {
 		return err
 	}