Transaction not yet indexed

668ECM7KF3zdxZzEoA3rKcPxq75q3zqC1igLKuS1udrovd6uap9eWfSgoeXEnR8CYhvmoKiuMLPcaS8QFRhSa3Tg

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