Transaction not yet indexed

28E15NAvwAzaWd8vbNBQ6Att7rrDq8qnME14MQLQUP2C6shLmvtsSehsjQpK17HZXzGPr5iTYpf9boLRkfMGptr1

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