op-celestia: fix helper tool (#242)

op-celestia/main.go

@@ -1,13 +1,12 @@
 package main
 
 import (
-	"bytes"
 	"context"
-	"encoding/binary"
 	"encoding/hex"
 	"fmt"
 	"os"
 
+	"github.com/ethereum-optimism/optimism/op-celestia/celestia"
 	openrpc "github.com/rollkit/celestia-openrpc"
 	"github.com/rollkit/celestia-openrpc/types/share"
 )
@@ -16,19 +15,13 @@ func main() {
 	if len(os.Args) < 4 {
 		panic("usage: op-celestia <namespace> <eth calldata> <auth token>")
 	}
+
 	data, _ := hex.DecodeString(os.Args[2])
-	buf := bytes.NewBuffer(data)
-	var height int64
-	err := binary.Read(buf, binary.BigEndian, &height)
-	if err != nil {
-		panic(err)
-	}
-	var index uint32
-	err = binary.Read(buf, binary.BigEndian, &index)
-	if err != nil {
-		panic(err)
-	}
-	fmt.Printf("celestia block height: %v; tx index: %v\n", height, index)
+
+	frameRef := celestia.FrameRef{}
+	frameRef.UnmarshalBinary(data)
+
+	fmt.Printf("celestia block height: %v; tx index: %v\n", frameRef.BlockHeight, frameRef.TxCommitment)
 	fmt.Println("-----------------------------------------")
 	client, err := openrpc.NewClient(context.Background(), "http://localhost:26658", os.Args[3])
 	if err != nil {
@@ -43,7 +36,7 @@ func main() {
 		panic(err)
 	}
 
-	namespacedData, err := client.Blob.GetAll(context.Background(), uint64(height), []share.Namespace{namespace})
+	namespacedData, err := client.Blob.GetAll(context.Background(), uint64(frameRef.BlockHeight), []share.Namespace{namespace})
 	if err != nil {
 		panic(err)
 	}