Transaction not yet indexed

5666MXQpvf78wK5JqqNPLtnamJwoBdKp2Aa87cdJ3AKfuJcFLnFw5QPehuuJw7FdrGGyi7byWYLZvJ77SS7gU4Zu

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