Transaction not yet indexed

iSXTZDWEEe9ZPUAneGJdJR5ssfpwMAjrKsLeFUNrWEatdfHM3EzrZzCorPNvkoAgJFnTmhr9bUsAgpm7XYPJjF9

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