Transaction not yet indexed

668UM45yzpdVsZQDAAdhN33RWgPPw74mPu7Vks7GhXMJVihao3jVu1P11Gc2k8RP2ecjBVXasTkkFbRFEXbffi44

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