Transaction not yet indexed

NkkpDQAJ819nRxwRGVRVKQqWuWmm2Y4KScoX9pyQ7ECvj59Aow5REDG6ESSe8cWdUPxo9gB19EjhpShnHwHoSEY

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