Transaction not yet indexed

668UNzoMzQWJeGUPZsYtkwXJ23PX8GvEAPSSeo5FuvfVme2jyCdnPRrfUrhq5AVMyXsv3YftvJC56kQpYUQf4akn

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