Transaction not yet indexed

668JmCXdssejATpyj4pv9rrMG8ev3XDSh3GMu5ZTaSi7Hf9zvSW4gjUeyqhFoF12WcnUZTi55snpv8MWuKQCDih

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