Transaction not yet indexed

518ykU46VR5bWhDKie7XErZjdQhwCvEextA9PoJMHH1Cv87ZAd7gPQXwx8KUUNbMDTQeK3Q8ujRJDVuLJdM4zNc8

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