Transaction not yet indexed

521riRVNBc2q6yUasFm99VxoTL4gNrAzFRDjpeZRru2KZJnkQcm2Mgj1zkGrRS2JnfZUcg3penPoXfLtBVCqfpos

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