Transaction not yet indexed

668MP75Fkn4JzywJPwvbHaJsnpBd8MLTLAW5F5SrFX1ick2oAPv6wTUPAcir2ZwzqnD8XCQbp5Pwdq7qygQzVc19

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