TxProcessor put ExitInfos computation inside TypeSynchronizer logic to avoid computing it for TypeBatchBuilder case

txprocessor/txprocessor.go

@@ -405,8 +405,9 @@ func (tp *TxProcessor) ProcessTxs(coordIdxs []common.Idx, l1usertxs, l1coordinat
 		return nil, nil
 	}
 
-	// once all txs processed (exitTree root frozen), for each Exit,
-	// generate common.ExitInfo data
+	if tp.s.Type() == statedb.TypeSynchronizer {
+		// once all txs processed (exitTree root frozen), for each
+		// Exit, generate common.ExitInfo data
 		var exitInfos []common.ExitInfo
 		exitInfosByIdx := make(map[common.Idx]*common.ExitInfo)
 		for i := 0; i < nTx; i++ {
@@ -436,9 +437,9 @@ func (tp *TxProcessor) ProcessTxs(coordIdxs []common.Idx, l1usertxs, l1coordinat
 			}
 		}
 
-	if tp.s.Type() == statedb.TypeSynchronizer {
-		// retuTypeexitInfos, createdAccounts and collectedFees, so Synchronizer will
-		// be able to store it into HistoryDB for the concrete BatchNum
+		// return exitInfos, createdAccounts and collectedFees, so
+		// Synchronizer will be able to store it into HistoryDB for the
+		// concrete BatchNum
 		return &ProcessTxOutput{
 			ZKInputs:           nil,
 			ExitInfos:          exitInfos,