Transaction not yet indexed

1b15AvTGxJz5Cot4Ss7A3efDan739jRSGS3cF7Fimo2qvPdkH4M9H7AzFvPkCyB6yoEYwKozigPBsf9oAHmQqy5

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.