refact: GetSequence method

dataavailability/datacommittee/datacommittee.go

@@ -105,53 +105,40 @@ func (d *Backend) Init() error {
 	return nil
 }
 
-// GetSequence gets backend data one hash at a time. This should be optimized on the DAC side to get them all at once.
+// GetSequence retrieves backend data by querying committee members for each hash concurrently.
 func (d *Backend) GetSequence(_ context.Context, hashes []common.Hash, _ []byte) ([][]byte, error) {
-	intialMember := d.selectedCommitteeMember
+	initialMember := d.selectedCommitteeMember
 
-	var found bool
-	for !found && intialMember != -1 {
+	var batchData [][]byte
+	for retries := 0; retries < len(d.committeeMembers); retries++ {
 		member := d.committeeMembers[d.selectedCommitteeMember]
 		d.logger.Infof("trying to get data from %s at %s", member.Addr.Hex(), member.URL)
 
 		c := d.dataCommitteeClientFactory.New(member.URL)
-
 		dataMap, err := c.ListOffChainData(d.ctx, hashes)
 		if err != nil {
-			d.logger.Warnf(
-				"error getting data from DAC node %s at %s: %s",
-				member.Addr.Hex(), member.URL, err,
-			)
+			d.logger.Warnf("error getting data from DAC node %s at %s: %s", member.Addr.Hex(), member.URL, err)
 			d.selectedCommitteeMember = (d.selectedCommitteeMember + 1) % len(d.committeeMembers)
-			if d.selectedCommitteeMember == intialMember {
+			if d.selectedCommitteeMember == initialMember {
 				break
 			}
-
 			continue
 		}
 
-		batchData := make([][]byte, 0, len(hashes))
+		batchData = make([][]byte, 0, len(hashes))
 		for _, hash := range hashes {
 			actualTransactionsHash := crypto.Keccak256Hash(dataMap[hash])
 			if actualTransactionsHash != hash {
-				unexpectedHash := fmt.Errorf(
-					unexpectedHashTemplate, hash, actualTransactionsHash,
-				)
-				d.logger.Warnf(
-					"error getting data from DAC node %s at %s: %s",
-					member.Addr.Hex(), member.URL, unexpectedHash,
-				)
+				unexpectedHash := fmt.Errorf(unexpectedHashTemplate, hash, actualTransactionsHash)
+				d.logger.Warnf("error getting data from DAC node %s at %s: %s", member.Addr.Hex(), member.URL, unexpectedHash)
 				d.selectedCommitteeMember = (d.selectedCommitteeMember + 1) % len(d.committeeMembers)
-				if d.selectedCommitteeMember == intialMember {
+				if d.selectedCommitteeMember == initialMember {
 					break
 				}
-
 				continue
 			}
-
 			batchData = append(batchData, dataMap[hash])
 		}
-
 		return batchData, nil
 	}