Transaction not yet indexed

21Knyc7g7SjeSskmNu4sZ53DPvqTR66i79kJVvVT5XK9HbcqPyYCoSegtVSQAPDKkf7YHkfZ5k1BUJ8Z8dCuSSP6

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