Condenser is the react.js web interface to the world's first and best blockchain-based social media platform, steemit.com. It uses STEEM, a blockchain powered by Graphene 2.0 technology to store JSON-based content for a plethora of web applications.

• Learning how to build blockchain-based web applications using STEEM as a content storage mechanism in react.js
• Reviewing the inner workings of the steemit.com social media platform
• Assisting with software development for steemit.com

We highly recommend using docker to run condenser. This is how we run the live steemit.com site and it is the most supported (and fastest) method of both building and running condenser. We will always have the latest version of condenser (master branch) available on dockerhub. Configuration settings can be set using environment variables (see configuration section below for more information). If you need to install docker, you can get it at https://get.docker.com

To bring up a running container it's as simple as this:

docker run -it -p 8080:8080 steemit/condenser

Environment variables can be added like this:

docker run -it --env SDC_DATABASE_URL="mysql://user:pass@hostname/databasename" -p 8080:8080 steemit/condenser

If you would like to modify, build, and run condenser using docker, it's as simple as pulling in the github repo and issuing one command to build it, like this:

git clone https://github.com/steemit/condenser
cd condenser
docker build -t="myname/condenser:mybranch" .
docker run -it -p 8080:8080 myname/condenser:mybranch

git clone https://github.com/steemit/condenser
cd condenser
mkdir tmp

Install at least Node v7.5 if you don't already have it. We recommend using nvm to do this as it's both the simplest way to install and manage installed version(s) of node. If you need nvm, you can get it at https://github.com/creationix/nvm.

Using nvm, you would install like this:

nvm install v7.5

We use the yarn package manager instead of the default npm. There are multiple reasons for this, one being that we have steem-js built from source pulling the github repo as part of the build process and yarn supports this. This way the library that handles keys can be loaded by commit hash instead of a version name and cryptographically verified to be exactly what we expect it to be. Yarn can be installed with npm, but afterwards you will not need to use npm further.

npm install -g yarn
yarn global add babel-cli
yarn install
yarn run build

To run condenser in production mode, run:

yarn run production

When launching condenser in production mode it will automatically use 1 process per available core. You will be able to access the front-end at http://localhost:8080 by default.

To run condenser in development mode, run:

yarn run start

It will take quite a bit longer to start in this mode (~60s) as it needs to build and start the webpack-dev-server.

By default you will be connected to steemit.com's public steem node at wss://steemd.steeemit.com. This is actually on the real blockchain and you would use your regular account name and credentials to login - there is not an official separate testnet at this time. If you intend to run a full-fledged site relying on your own, we recommend looking into running a copy of steemd locally instead https://github.com/steemit/steem.

The intention is to configure condenser using environment variables. You can see the names of all of the available configuration environment variables in config/custom-environment-variables.json. Default values are stored in config/defaults.json.

Environment variables using an example like this:

export SDC_CLIENT_STEEMD_URL="wss://steemd.steemit.com"
export SDC_SERVER_STEEMD_URL="wss://steemd.steemit.com"

Keep in mind environment variables only exist in your active session, so if you wish to save them for later use you can put them all in a file and source them in.

If you'd like to statically configure condenser without variables you can edit the settings directly in config/production.json. If you're running in development mode, copy config/production.json to config/dev.json with cp config/production.json config/dev.json and adjust settings in dev.json.

If you're intending to run condenser in a production environment one configuration option that you will definitely want to edit is server_session_secret which can be set by the environment variable SDC_SESSION_SECRETKEY. To generate a new value for this setting, you can do this:

node
> crypto.randomBytes(32).toString('base64')
> .exit

If you've followed the instructions up until this point you will already have a running condenser installation which is entirely acceptable for development purposes. It is not required to run a SQL server for development. If you're running a full-fledged site however, you will want to set one up.

Once set up, you can set the mysql server configuration option for condenser using the environment variable SDC_DATABASE_URL, or alternatively by editing it in config/production.json. You will use the format mysql://user:pass@hostname/databasename.

Example:

export SDC_DATABASE_URL="mysql://root:password@127.0.0.1/steemit_dev"

Here are instructions for setting up a mysql server and running the necessary migrations by operating system:

OS X:

brew update
brew doctor
brew upgrade
brew install mysql
mysql.server restart

Debian based Linux:

sudo apt-get update
sudo apt-get install mysql-server

On Ubuntu 16.04+ you may be unable to connect to mysql without root access, if so update the mysql root user as follows:

sudo mysql -u root
DROP USER 'root'@'localhost';
CREATE USER 'root'@'%' IDENTIFIED BY '';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%';
FLUSH PRIVILEGES;

Now launch mysql client and create steemit_dev database:

mysql -u root
> create database steemit_dev;
> quit

This is a required step in order for the database to be 'ready' for condenser's use.

Install these modules globally:

yarn global add sequelize sequelize-cli pm2 mysql mysql2

Edit the file src/db/config/config.json using your favorite command line text editor being sure that the username, password, host, and database name are set correctly and match your newly configured mysql setup.

Run sequelize db:migrate in src/db directory, like this:

cd src/db
sequelize db:migrate

Tarantool similarly to mysql is not required for development but if you're running a full-fledged site with condenser you will want to run one.

OS X:

brew install tarantool

Debian based Linux:

sudo apt-get install tarantool

Test the interactive console:

user@example:~$ tarantool

• Prefer CamelCase js and jsx file names
• Prefer lower case one word directory names
• Keep stylesheet files close to components
• Component's stylesheet file name should match component name

We are using Airbnb JavaScript Style Guide with some modifications (see .eslintrc). Please run eslint in the working directory before committing your changes and make sure you didn't introduce any new styling issues.

If a component requires a css rule, please use its uppercase name for the class, e.g. "Header" class for the header's root div. We adhere to BEM methodology with exception for Foundation classes, here is an example for the Header component:

<!-- Block -->
<ul class="Header">
  ...
  <!-- Element -->
  <li class="Header__menu-item">Menu Item 1</li>
  <!-- Element with modifier -->
  <li class="Header__menu-item--selected">Element with modifier</li>
</ul>

To report a non-critical issue, please file an issue on this GitHub project.

If you find a security issue please report details to: security@steemit.com

We will evaluate the risk and make a patch available before filing the issue.