Transaction not yet indexed

28MdcDKcgaDAqmBN17fBA7Z41ccAqyYcXfB4nvhR2Exo4Eh6egt4F9mhizfkdPeF94drkmt1ckzwL8hWHTqKSLu6

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