Transaction not yet indexed

668SxtDU6w48reKAk2LPA4gLTuUA4MCZsCHaCcEJPSaZWEWDfUpo5QESfaiGf3XMn5PXCvGdiwPHWb6AmMrNUX3u

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