Transaction not yet indexed

421AmSbkJn4bwC7nFPPirAQQJqvbCxn5W2c1bBC2WpAMibQR8QyN8sqeATjpukoWYSBA1fQ2QUYzBHdMMGjLEyzA

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