Transaction not yet indexed

668NzwfuRTD2qtQGhVE4jAiPumD8BNDbbgupMjF6FqFhtPyFgEHvqWUWHf1xFGmCnVnAoRHZZCnJcfACSFr4jK3

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