Transaction not yet indexed

668EFLEVkst41MSSBwoYtAsAF6AQ1KkKdCjqaAmd4QPgymQKg8QGAdDPUz62Ro43aDCefP4QmHpJnWEZgBELqGPa

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