Transaction not yet indexed

M668tWh8xgACiYNFLLcpsVwB2knQFwFNjiSNofHoLtKCYcgpQwdScfkWReKHwByF75rSaKc7FzdEPi9FLyAwPrS

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