update dslib client interface

tools/datastreamer/main.go

@@ -558,14 +558,13 @@ func decodeEntry(cliCtx *cli.Context) error {
 		os.Exit(1)
 	}
 
-	client.FromEntry = cliCtx.Uint64("entry")
-	err = client.ExecCommand(datastreamer.CmdEntry)
+	entry, err := client.ExecCommandGetEntry(cliCtx.Uint64("entry"))
 	if err != nil {
 		log.Error(err)
 		os.Exit(1)
 	}
 
-	printEntry(client.Entry)
+	printEntry(entry)
 	return nil
 }
 
@@ -597,35 +596,28 @@ func decodeL2Block(cliCtx *cli.Context) error {
 		Value: l2BlockNumber,
 	}
 
-	client.FromBookmark = bookMark.Encode()
-	err = client.ExecCommand(datastreamer.CmdBookmark)
+	firstEntry, err := client.ExecCommandGetBookmark(bookMark.Encode())
 	if err != nil {
 		log.Error(err)
 		os.Exit(1)
 	}
-
-	firstEntry := client.Entry
 	printEntry(firstEntry)
 
-	client.FromEntry = firstEntry.Number + 1
-	err = client.ExecCommand(datastreamer.CmdEntry)
+	secondEntry, err := client.ExecCommandGetEntry(firstEntry.Number + 1)
 	if err != nil {
 		log.Error(err)
 		os.Exit(1)
 	}
-
-	secondEntry := client.Entry
 	printEntry(secondEntry)
 
 	i := uint64(2) //nolint:gomnd
 	for secondEntry.Type == state.EntryTypeL2Tx {
-		client.FromEntry = firstEntry.Number + i
-		err = client.ExecCommand(datastreamer.CmdEntry)
+		entry, err := client.ExecCommandGetEntry(firstEntry.Number + i)
 		if err != nil {
 			log.Error(err)
 			os.Exit(1)
 		}
-		secondEntry = client.Entry
+		secondEntry = entry
 		printEntry(secondEntry)
 		i++
 	}