Transaction not yet indexed

iSMSzuTEFjKnqzTFP8vKMPG5cFAzJ9yZF1C8H54WjrcYwJGuvcdPvpD8iMENtvDXPTJWuKPiLeoeATkKTw5xpdr

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