Transaction not yet indexed

668chYSB8fMG8WDeCJwMEM9VuLwH6JYQXZcUU1jc7yzguD3DUGD5ncfFCnNTgjCsUNed2FCmGUFRtB8xXp7JLRAM

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