Transaction not yet indexed

668mhhZLPMV5Sbu7dQRL3E9Vv39iBwTeHVu4x2dd5XCKV4fvTPzbasc9LNXPhGqfQSgphj2AvADPfnXTs8J13Ex7

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