Transaction not yet indexed

521sGRpESVDKyKS7jxoyTHRyCH4VJ9ot7hrPXBkh6ufKPf8cwJ4cM8FDPvk5jmSjqeeX4k54Sf4SWYMQutzaR9SK

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