Transaction not yet indexed

6421DLCrf8ZxSq2aB2dfNUxqJzrDjH92dSEdqsKkjjFPtmHSMW5sWQFtcEU3zDfCLq55HVAfrCfUNQix7jFT299M

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