Transaction not yet indexed

Z21iWfUM3qK2nVqraVJViF56uYwEajqAg1XC8SMPRcvDARLMnFJZgbeXrCMmpZuiiaT6mKYoGo3eKUnkAkYM8e1

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