Transaction not yet indexed

668RnnZzpDqVi9SrTu1mfmdVQe2N5bYD8PEQsov1PebmpRk951pDqGkeZ3SKw2bQFdxkjMQKPBrT2fmn2bY4oAP6

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