Transaction not yet indexed

28FtZcwzjCSsbtVEke5s2dKZdNtfYW7V4n74w4cCVSSCM1Hm5S4EMajuTaexgpFysYrHu6ur4GT7t7JfjNBqLC15

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