Transaction not yet indexed

521nrdTP8eXuuUgMDFJMjZuSwuzde7NbbwczMwkBhmgQE1QEX7V7DpsJeX8eAFziCfu9yPYHU32FATN8cHF4aew2

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