Transaction not yet indexed

668rfwtCMMgCnvwyjsxfeJeY9HWpPjiUwMEKCiSwVxaheB7YrB9twwAKXz1GyHaGFMPkAojvT7FhfjENTwb2ML7K

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