Transaction not yet indexed

5C99adZ5EmXNd8n3eqqHRL4bAwKoQ8GTj6oKcWbKN8RafEgYbQTAZVRgpgpstT7EWfQx5qtJmUpSvAkWbt1Sm479

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