Fully distributed twitter built on holochain
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Latest commit f5dd109 Sep 30, 2018



Code Status Build Status In Progress Chat License: GPL v3

P2P twitter-clone built on Holochain A group of cats is called a Clutter, Cludder, Clowder, Kendle, or Kindle. Maybe it's time for a peer-to-peer shoutcast system to eat a certain blue bird.

Clutter is a work in progress. It's a sample application designed to demonstrate how easy it is to build applications on Holochain.

If you would like to simply download a build version of the latest Clutter, download and unzip the latest release

Code Status: Pre-alpha. Not for production use. This application has not been audited for any security validation.

Clutter Installation

From Holochain Release

If you want to just see Clutter in action and haven't yet installed Holochain, the best way to try it out is simply to use the version included in the latest Holochain release. Go to the Holochain Releases page and download and unzip the archive for your machine. That archive contains a full version of clutter, along with instructions for running it.

From Clutter Release

You can download the latest Clutter release directly from the Clutter Release page.

Via hcdev

Prerequiste: Install holochain on your machine and make sure you do the step to set the $GOPATH.

Run the command:

hcdev init -cloneExample=clutter

This will create a copy of the Clutter source code in a clutter directory.

You can then run clutter in development mode with:

cd clutter
hcdev web

and point your browser at http://localhost:4141 to access the UI.


assuming that you've already setup your Holochain environment with hcadmin init you can join and run Clutter with:

cd clutter
hcadmin join . clutter
hcd clutter

and point your browser at http://localhost:3141 to access the UI.

Installation: for Developers

Prerequiste: Install Holochain on your machine and make sure you do the step to set the $GOPATH.

Dependencies: If you want to work on the Clutter UI, you will need nodejs (https://nodejs.org/en/) (LTS) installed, with npm or yarn (https://yarnpkg.com/lang/en/docs/install) to be able to build and copy it from the ui-src to the ui directory:

The following commands will clone the latest build of clutter to your machine (you may want to use your own fork instead of our repo) and then you will either install npm or yarn to build the UI for the app.

git clone https://github.com/Holochain/clutter.git
cd clutter/ui-src
npm install # (or yarn install)
npm run build # (or yarn build)
cd ..

After npm run build, npm start to configure and start the React UI.

Running Clutter in Dev mode

Now if you want to run the app, you can run:

hcdev web

Running Clutter with Local Boostrap

Holochain does local discovery with MDNS which is not always availble on Windows machines. So during development instead you may want to run your own local bootstrap server for node discovery. These instructions detail how to run 2 instances of Clutter and your own Bootstrap server.

Make two copies of your your clutter folder one called clutter1 and the other clutter2. Both folders will need to have a dna folder and a ui folder in each.

Firstly run the bootstrap server which will let each instance of Clutter know about its peers. The bs command is part of the Holochain install. If it doesn't work you probably need to set the $GO_PATH variable. (Soon we won't need this step)


You will get a response like

2018/01/11 11:24:03 app version: 0.0.2; Holochain bootstrap server
2018/01/11 11:24:03 starting up on port 3142

Now start up Clutter in each folder.

  cd clutter1
  hcdev -DHTport=6001 -agentID=lucy -bootstrapServer=localhost:3142 web 3141

  cd ..
  cd clutter2
  hcdev -DHTport=6002 -agentID=phil -bootstrapServer=localhost:3142 web 4141

You will see a response like:

Copying chain to: /Users/philipbeadle/.holochaindev
Serving holochain with DNA hash:QmVbbeDAHVxC9cTvx6UhNEeTCK99SRKfxKDz3s4mR6TnsS on port:3141

Now open a browser at http://localhost:3142/QmVbbeDAHVxC9cTvx6UhNEeTCK99SRKfxKDz3s4mR6TnsS (substituting in the DNA hash from the response above if different) and look at the Bootstrap server. You will see 2 records like this


Now open a browser to http://localhost:3141 and you will see Clutter. Open another tab to http://localhost:4141 and you now have 2 instances of Clutter that you can chat between. Add a handle in each and then meow and follow each instance and you will see the meows!!

Docker Usage

You can do all this much easier with Docker. Download the latest release from Clutter Release, unzip it and cd into the folder. Then run

  cd ui-src
  npm install # (or yarn install)
  npm run build # (or yarn build)
  cd ..
  TARGETDIR=$(pwd) docker-compose up

This will build the source into a React app and install it in Holochain. Then you can open browsers to

  http://localhost:3142 - Bootstrap
  http://localhost:3141 - Clutter
  http://localhost:4141 - Clutter
  http://localhost:5141 - Clutter

and try out Clutter.


To run all the stand alone DNA tests:

hcdev test


Scenario - Collision Of Handles - Sequence Diagram

  hcdev scenario collisionOfHandles


hcdev scenario followAndShare

This test spins up two nodes jane and joe and tests that following and reading posts works. To watch the network traffic and details try:

hcdev -debug scenario followAndShare


This test is designed to be run on separate machines and spins up many clones on each and confirms that they all talk to each other.

UI automation

in clutter folder

  hcdev -execpath=$HOME/.holochaindev1 -DHTport=6001 -agentID=agent3141 web 3141
  hcdev -execpath=$HOME/.holochaindev2 -DHTport=6002 -agentID=agent4141 web 4141
  hcdev -execpath=$HOME/.holochaindev3 -DHTport=6003 -agentID=agent5141 web 5141

if running all in one terminal you will need to kill the processes between restarts.

  kill -kill `lsof -t -i tcp:3141` & kill -kill `lsof -t -i tcp:4141` & kill -kill `lsof -t -i tcp:5141`

What the Automated build does

When a branch is pushed to Github Travis runs a build. The build does the following:

  1. Installs docker-compose
  2. Runs docker-compose up -d which spins up a bootstrap server and 3 instances of clutter
  3. Installs the cypress dependencies
  4. Runs the Cypress e2e tests.
  5. If on master a new release is published to github releases. (coming soon)

Feature Roadmap and Current Progress

  • Set default handle from AgentID string
  • Enable users to change their handle
  • Share mews (tweets) -- up to 256 characters
  • Follow someone (by specified handle)
  • Unfollow someone
  • View post stream of people you follow sorted by time
  • Provide React/Redux UI
  • Implement Cypress and Storybook UI testing
  • Detect #hashtags in post text
  • Create hashtag anchors if they don't exist
  • Link from hashtag anchor to posts with that hashtag
  • Show posts which have a particular hashtag
  • Mark posts as a favorite ⭐️
  • Link favorited posts from a user/handle
  • Show someone's ⭐️ favorited posts
  • Edit a previous post (partially implemented)
  • Refollow someone previously unfollowed (partially implemented - Have to fix put/del/put links sequence)
  • Detect @mentions in post text
  • Link from handle posts which @mention them
  • Show @mentions for a user/handle
  • Lists - Special anchor type with text being "[userhandle]-[listname]" with links to users on a named list which is named unique-per-user
  • Reply to mew (add reply-to link + link to replies)
  • Remew/Retweet (link to original in content of post? + new content?)
  • Enable direct messages via N2N private messaging
  • Detect links
  • Include links (w/ link shortening?) as linked link
  • Pretty display of OpenGraph data for first link
  • Create/Read/Update/Delete User profile info (first name, last name, location, picture, website, etc.)
  • Keyword indexing/search with Holodex integration
  • Search with result groupings/tabs (people, posts, tags, trending, )
  • Add UI tabs/views: feed, mentions, direct messages, lists
  • Embed pictures ("pic" link to url) with pretty render
  • Integrate with Twitter for publishing mews to tweets from your unique userspace
  • Integrate with DPKI for bridging app contexts


We welcome pull requests and issue tickets. Find us on gitter to chat.

Contributors to this project are expected to follow our development protocols & practices.


License: GPL v3

Copyright (C) 2017, The MetaCurrency Project (Eric Harris-Braun, Arthur Brock, et. al.)

This program is free software: you can redistribute it and/or modify it under the terms of the license provided in the LICENSE file (GPLv3). This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Note: We are considering other 'looser' licensing options (like MIT license) but at this stage are using GPL while we're getting the matter sorted out.