Transaction not yet indexed

NmkWYwU2hpNwnb3Yf2G4GTzz3A1wupPyTRvcKeo6s4JM14AtaPaVUfvxhUBm6f5qTfhEvcgAgC2NspyqnoRZRUE

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