Transaction not yet indexed

MDkU4TfXrbBAnZSstUqCpFkNAJVgVrNBTRmRYiGsoWhx2JS64hycLU256XzgFU6vxH4YSkJaxTQHsCePZjALEo3

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