Simple app for doing multi-node testing from one UI
Branch: develop
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Latest commit 6e82e68 Feb 21, 2019



please note, this repository contains versions that are compatible with the different versioned releases of Holochain. The main branch, develop, will track with the develop branch of holochain-rust. Please note that it may not always be up to date, since the develop branch gets new commits daily.

For the version compatible with 0.0.4-alpha, please checkout the master branch.

Project Chat License: GPL v3

*Simple app for doing multi-node testing


This app was built to do multi-node testing of the same DNA from one user interface.


  1. Install the Holochain command line dev tool by following the instructions here:

  2. Clone this repo:

    git clone
  1. Make sure things are working by running the tests:
cd simple-app
hc test
  1. Install the n3h networking component

  2. Compile the DNA:

hc package
  1. Run two instances of it specifying the install directory for n3h (in the examples below this is /home/eric/holochain/n3h). First, in one terminal window, run the first node on port 8888 like this:
HC_N3H_PATH=/home/eric/holochain/n3h hc run --port 8888

Note the network address that is created for the node, you should see something like:

READY! tcp:// ["/ip4/", "/ip4/"]

Then, in another terminal window (from the same directory), run the second node on port 8889 using a different agent name and the address from the first node as the bootstrap node like this:

HC_N3H_BOOTSTRAP_NODE=/ip4/ HC_AGENT=testAgent2 HC_N3H_PATH=/home/eric/holochain/n3h  hc run --port 8889
  1. Finally to run the UI: simply open the ui/index.html file in a browser, and it should start communicating with the two instances of hc via websockets.

NOTE: the repo also provides configuration files for running simple app using the holochain conductor instead of use the hc cli. You will have to edit the n3h_path for where you installed it, as well as add the bootstrap_nodes into the second config file each time you run the second node using the conductor.


Currently n3h process spawned by hc run are not automatically killed when the run ends so you may have to kill them manually with killall node


Holochain is an open source project. We welcome all sorts of participation and are actively working on increasing surface area to accept it. Please see our contributing guidelines for our general practices and protocols on participating in the community.


License: GPL v3

Copyright (C) 2019, Holochain Foundation

This program is free software: you can redistribute it and/or modify it under the terms of the license p rovided in the LICENSE file (GPLv3). This program is distributed in the hope that it will be useful, bu t 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. See this article for some of our thinking on licensing for distributed application frameworks.