Transaction not yet indexed

21B6RLEhLFFHc4xEHnAAvMsbVCPNoXKtnZynKFk6JgFfEnRZCfNe4i6UpgEBj5YDT1d92pKoedsL9hGHxA5cNpy1

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