Transaction not yet indexed

668PSmnppiYAUtLYvQCqsn56FjdvbhVJnxexkHF28ecuHSPYCfsGHEiwYmXiPPJRUSYEHSr4169h1WLhDkjVoMKm

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