Transaction not yet indexed

21Sp18dUZfaRnQj6yaBBZE5qPmART84RFBLC6Kgow1HTRxbjnrDjMXubTbxbKSqJqbyXSwG9UMSHuDMa7AfGPzai

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