Transaction not yet indexed

28Un8fo4PBgAMBFR8CK2EfWfZXgPn7VFx5w9QEVZce7DqCux5wF64m5VqsMmZ4K2qmY9irRKfqbWP4z5KFNb7nzQ

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