Transaction not yet indexed

421UNLk5SQAmRuiVwqzgQ8HyXb1fRgnTuDtCeYucR5d5AE6PaZ2j5thySAMbfXPzrDczBUG17WB1VhRb8CSMLrqj

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