Transaction not yet indexed

ack3fktTYDsFLUjdXg18ADSyxdgiCaN6g1wnTBjKGJ3MFv37ZuTXmSNRDaLMfuTmMShaCgFJAXAqUGkGYNLdoQf

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