Transaction not yet indexed

668bLMFcLTkxTwmUQw6Z9cvif5PZLs5i176Xe5iDvwBhdZ3MPSsd6RvtaqEEGvNWHYoS9yv7db4e1CkadGCJkKK3

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