![](http://i.imgur.com/C6zRpTP.png)
I've started building an analytical dashboard for Bitshares/Openledger (similar to [steempunks](http://steempunks.com) and will be open sourcing Elixir libraries along the way. This release adds a simple subscription interface by integrating GenStage, a specification for handling and exchanging events.

# Repo and package

* [Github Repo](https://github.com/cyberpunk-ventures/graphene_client_ex)
* [Hex package](https://hex.pm/packages/graphene_client_ex)

# Changelog

* Graphene.Stages.Supervisor module 
* Graphene.Stages.Blocks.Producer module
*  [example](https://github.com/cyberpunk-ventures/graphene_client_ex/blob/master/lib/stages/consumer_example.ex) of GenStage blocks consumer
* config option to start Stages.Supervisor process
* minor code style improvements and bugfixes

# GenStage client example 

```
defmodule Graphene.Stage.Blocks.ExampleConsumer do
  use GenStage
  require Logger
  alias Graphene.Block

  def start_link(args, options \\ []) do
    GenStage.start_link(__MODULE__, args, options)
  end

  def init(args) do
    {:consumer, args, subscribe_to: args[:subscribe_to]}
  end

  def handle_events(events, _from, state) do
    block = hd(events)
    for tx <- Block.unpack_txs(block) do
      Logger.info """
      New transaction:
      #{inspect tx}
      """
    end
    {:noreply, [], state}
  end

end

```
# About Elixir

Elixir is a functional programming language with superior concurrency primitives, distributed computation and fault tolerance capabilities based on Erlang/OTP.
Personally, I am really happy with my bet on Elixir to build cryptotokens related apps and strongly recommend every developer to try it.

Learning resources:

* [ElixirConf Jose Valim Keynote](http://confreaks.tv/videos/elixirconf2016-keynote)
* [ElixirConf 2016 Chris McCord Keynote](http://confreaks.tv/videos/elixirconf2016-keynote)
* [Elixir School](https://elixirschool.com/)
* [Elixir Crash Course](http://elixir-lang.org/crash-course.html)

# Roadmap

* **Next: assets and feeds**
* More utility functions
* ~~Implement subscriptions~~
* ~~Investigate PubSub implementations~~
* More tests and docs