@type t() :: %Anoma.Protobuf.Envelope{
  __unknown_fields__: [
    {field_number :: integer(), Protobuf.Wire.Types.wire_type(),
     value :: term()}
  ],
  inner_message:
    {:announcement, Anoma.Protobuf.Announce.Announcement.t() | nil}
    | {:list_intents_request, Anoma.Protobuf.Intents.List.Request.t() | nil}
    | {:list_intents_response, Anoma.Protobuf.Intents.List.Response.t() | nil}
    | {:add_intent_request, Anoma.Protobuf.Intents.Add.Request.t() | nil}
    | {:add_intent_response, Anoma.Protobuf.Intents.Add.Response.t() | nil}
    | {:nullifiers_request, Anoma.Protobuf.Indexer.Nullifiers.Request.t() | nil}
    | {:nullifiers_response,
       Anoma.Protobuf.Indexer.Nullifiers.Response.t() | nil}
    | {:unrevealed_commits_request,
       Anoma.Protobuf.Indexer.UnrevealedCommits.Request.t() | nil}
    | {:unrevealed_commits_response,
       Anoma.Protobuf.Indexer.UnrevealedCommits.Response.t() | nil}
    | {:unspent_resources_request,
       Anoma.Protobuf.Indexer.UnspentResources.Request.t() | nil}
    | {:unspent_resources_response,
       Anoma.Protobuf.Indexer.UnspentResources.Response.t() | nil}
    | {:mempool_dump_request, Anoma.Protobuf.Mempool.Dump.Request.t() | nil}
    | {:mempool_dump_response, Anoma.Protobuf.Mempool.Dump.Response.t() | nil}
    | nil,
  message_id: binary(),
  sender_info: Anoma.Protobuf.NodeInfo.t() | nil
}