Transaction not yet indexed

668TcSQyQ8mGmNGgCqsLL7ZA3kPeYf8oyuy7xrWmxDRXkxaNDKsaRe4K2hAz36ZFEDhVCajjcf8eekUtshndZw19

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