What is Polaris?¶
Polaris is an implementation of SEP-24 maintained by the Stellar Development Foundation (SDF). SEP-24 is a standard defined to make wallets and anchors interoperable, meaning any wallet can communicate with any anchor for the purpose of withdrawing or depositing assets into the stellar network.
Polaris is not a library or a framework; its an extendable django app. Like many django apps, it comes with fully-implemented endpoints, templates, and database models. As a developer using Polaris, you don’t need to know everything about how Polaris is implemented, even though the project is completely open source and available at the SDF’s github.
Polaris does not aim to give you full control of the SEP-24 implementation. Instead, Polaris provides several base classes for integrating with its already-implemented functionality, similar to a framework. This documentation focuses on the parts of Polaris you will need to use in order to fully implement the SEP-24 protocol.
Documentation for these base classes can be found in the Integrations section.
For an example on how to use Polaris, see the SDF’s stellar-anchor-server.
First make sure you have
cd’ed into your django project’s main directory
and then run
pip install django-polaris
Add it to
INSTALLED_APPS in settings.py
INSTALLED_APPS = [ ..., "polaris", ]
Add Polaris’ PolarisSameSiteMiddleware to your
settings.MIDDLEWARE. Make sure its listed above
MIDDLEWARE = [ 'django.middleware.security.SecurityMiddleware', 'polaris.middleware.PolarisSameSiteMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware', ]
PROJECT_ROOT in your project’s settings.py. Polaris uses this to
PROJECT_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
Paste the text below into
PROJECT_ROOT/.env. The stellar-anchor-server
repository contains instructions for modifying this file to fit your use case.
DJANGO_SECRET_KEY="secretkeykeysecret" DJANGO_DEBUG=True STELLAR_DISTRIBUTION_ACCOUNT_SEED="SCHTHF3N4SHEQM25M43FJ43UTCZP6OO3JKYVJCJBZ4YW6KVVAGC2OUCT" STELLAR_ISSUER_ACCOUNT_ADDRESS="GCTVATNFP4FYKZ7BXZ3EOPVKEL2DGDCB2AVBDUNLW7NYR7REF5PMKY4V" # STELLAR_NETWORK_PASSPHRASE can either be "Test SDF Network ; September 2015" or # "Public Global Stellar Network ; September 2015" or a custom passphrase # if you're using a private network. STELLAR_NETWORK_PASSPHRASE="Test SDF Network ; September 2015" # HORIZON_URI can point to a custom Horizon URI. It currently points # to the testnet URL. HORIZON_URI="https://horizon-testnet.stellar.org/" SERVER_JWT_KEY="secret"
Add the Polaris endpoints in
import polaris.urls from django.urls import path, include urlpatterns = [ ..., path("", include(polaris.urls)), ]
python manage.py migrate
You now have Polaris completely integrated into your Django project!
To set up the development environment, fork the repository, then:
cd django-polaris docker-compose -f docker-compose.dev.yml build docker-compose -f docker-compose.dev.yml up
You should now have a minimal anchor server running on port 8000. When you make changes locally, the docker containers will restart with the updated code. Your browser may complain about the service using a self-signed certificate for HTTPS. You can resolve this by marking the certificate used by the service as trusted.
You can install the dependencies locally in a virtual environment:
pip install pipenv cd django-polaris pipenv install --dev pipenv run pytest -c polaris/pytest.ini
Or, you can simply run the tests from inside the docker container. However, this may be slower.
docker exec -it <image ID> pipenv run pytest
Submit a PR¶
After you’ve made your changes, push them to you a remote branch and make a Pull Request on the stellar/django-polaris master branch.