Transaction not yet indexed

668LnNSvKH2YrEowpfzFftit4pcJ7k1HkPY3sTLmYveFSfefnRRE8EZbpjdp4Z2eBp1u1Q6EGtwwKKvkTRhNnFb1

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