Transaction not yet indexed

668vyNaRdFUboXbPG97W4tFaVM6aoVpPDtgeG3AKrbx6dpJrsc8eapzpgK47A7i6A1XSDJLxvLP2vtTd5X5Urz44

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