Transaction not yet indexed

AmMMZ7TMY69cvvz6dzDWWN8b7vTPB8Sre1LKAv7YUfkyVvdPfcy4p5rsugqqTGjZ5ikCbTiTfNAxHJf1y4ryHzu

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