Transaction not yet indexed

21SzfRUNSSL4apkbhPQBnNEdcnQQjPCyygpKHRQZHsCnPCtb52AS3BsjtACwHaVv4Ko7KExGgyGV6pXGKKzpn9u6

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