Transaction not yet indexed

668sCQ35ZbyLJDYToD1ZeAXh12hRYkXyNAJzfWpgZiUYMdyvB4DPb18QkprXBgAmj2HmCAdBrtVt6r5iviqBfic4

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