Transaction not yet indexed

668RwSfG6f4oJdAH6C1GRKwCysSneaeS2WcPM9wePWje2RmXnyqh4B5VnakqPV7yhvN2gevmsmpQVFaYfLdUJrst

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