Transaction not yet indexed

421ZifnmW3FG6JvjEVFccHEXYbP5cfUoCgChcER3fof8YRBr2TcEriYgX9NDPqGVn2NaEercsbFSM4DPG6VwdsN4

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