Transaction not yet indexed

521JC2mAb1ftxtstkZJK5sY2ouWi1FSNr4VyWG6qQrzzxQyCwMz2ApYXSr1HaxjdHPUAzNuLezwT5zTrJd27FHh7

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