Transaction not yet indexed

M421CYMKHqii2x5fM1hh3UdExJRG3XSEHJrBAe5cH9DWroaU1PbZjMRnt8azVWhuLLZoDUSwzXB1ZwigtW2o7CC

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