Transaction not yet indexed

iStt2dVM69ngoXzX1btt7DWFw3BmZiB5wJ7xu1Jm7Xn5FmVibnfGggv4fiGGa7DaNVAvbsWEPjZeiDPdVa66j78

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