Transaction not yet indexed

668HhRPScX2fdYaHrk3dZmgNkDF8BN1YfpLrqtxQwTPFTcVMxL5GzAsFwUDPqXLwsVy4zoGqKe4P2REJGA4wY81y

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