Transaction not yet indexed

668mTjMmcRYsT4NELLDgScjNFMZe16R4eVqhXBSBDSzwT1ziNyf3YX8wifaT8QkwujdZBbdfhC1F4jYNAackFES7

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