Transaction not yet indexed

5n21FmCd4n7q5idTVSXxHzyymsbJ3p9H3qeDkGaNyD6w5PnSekibY8r2tGcc2WNGS5X6tf2xYLLEFqeH9iN5u16d

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