Transaction not yet indexed

668NbcdwSADK4UrBpQUYrLF82wtB66Gk423sxgFCfbWvLGx9BuktgFK39zkk5F3Kh6Y8aLgBCD16yckgyXf35aiW

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