Transaction not yet indexed

6668kaYVQw2Pnu3PFSSiRCDqMSXYQztYTUctMDWu8BNYToMEfhLKhnnfqpcFM5vkdKzUPQqjVdJ4PWt4HJEHumV1

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