Transaction not yet indexed

21So5nFA6Y5e5oxZYTaQ6RQvsqHMidAxMoQV8JMDvFmHJsQP4erK1uMAyp51CqhLHJCgce84sxcd1dMQSTr5snzS

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