Transaction not yet indexed

668UMssgLnmM1P3Wvbwuidsn2zaM8pQTA7KQQgCVPRWRSZpQ8GPoSca6nEiMppzyZkSyKFnbDb3R9aUmTCLWo8sL

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