Transaction not yet indexed

MdK8JvmPRcMkaWWXCTSJdx1QurCeGJNCff9kbkNXe3LU66qcnrDE787Exor3KVH6cDAKqsKctKPQB1TJxYLkHdS

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