Transaction not yet indexed

668HUvUPRPCBAAtBBYgSQzM73yTce9FtMVSXW2apvpRTQ3hLazrNbFVdErxHAcZ5XvmmHG7Z9Z83S9GAfgxxRUTC

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