Transaction not yet indexed

668CDCEmGaRrC8zPLfW8PyKacdzKsBDGkDq39T2xnFPKoqUYhRMiKGZ3hcYP5upaBUpbHs3WS1VZ5xtF1f5J658J

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