Transaction not yet indexed

21mtYSTktHffmgNntUZ6ZBrE14ySPGzrg6kSyUEeQ7SSqe1Xdn8MWQgT41P7e5CehptcNKNMXqFQffL3YMcucS79

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