Introduction to Federation in Stellar Blockchain

Prerequisites

  1. Basic knowledge of how cryptocurrency technologies.
  2. Have a Stellar account, you can easily create one from the stellar account viewer or with the Interstellar.exchange wallet.

Overview

About Stellar

Federation: What and Why

Stellar Address

  1. username is the unique identification of an account, most of the time it’s an email address as an email is naturally unique in the whole world.
  2. domain.tld is the federation server link where you have created your stellar federation address, for technical persons it’s the server where we’ll look for the federation configurations (stellar.toml) link to query the real public key matching with the username.

Creating a Stellar Address

  1. https://stellarfed.org
  2. https://interstellar.exchange
  3. https://stellarid.io/

Connecting to interstellar.exchange

Sending Money (XLM) to a Stellar Address

  1. Interstellar is just one of the easier federation server many Stellar peoples are using daily, any other could do as long as it’s trusted by the community too.
  2. XLM is the native currency of the Stellar Blockchain.
  3. As we’re on Interstellar itself (where we have created our federation address), there is no need to fill the second part of the address. It’s guessed to be *interstellar.exchange.

Setting Up a Federation Server

  1. Create a specific configuration file into the .well-known folder, accessible from this link: https://YOUR_DOMAIN/.well-known/stellar.toml
  2. Add the federation_url into your configuration file, similar to the Interstellar one shown in the image up here with the name FEDERATION_SERVER.
  3. Implement federation url HTTP endpoint, here we have two possibilities either building from scratch or start from the one open sourced by Stellar Development Foundation and accessible over on GitHub.
  1. Install MySQL. Postgres or Sqlite3 can be use as well
  2. Install Go tools, as the federation server has been built with Go programming language.
  3. Download and run the federation server

Install MySQL

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

Install Go Tools

cd /usr/local : go into the right folder to install the binary
wget https://dl.google.com/go/go1.11.1.linux-386.tar.gz : to download our binary into the current directory
tar -C /usr/local -xzf go1.11.1.linux-386.tar.gz : unzip the downloaded binary

Download and Run the Federation Server

port = 8000[database]
type = "mysql"
dsn = "dbuser:dbpassword@/dbname"
[queries]
federation = "SELECT account_id as id FROM Users WHERE username = ? AND domain = ?"
reverse-federation = "SELECT username as name, domain FROM Users WHERE account_id = ?"

Conclusion

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