Content

Estimated reading time: One minute

Sections in this page

• Want to know more?
• App Boilerplate
• App Builder
• CI
• Ragger
• Speculos

We provide a complete framework to develop Embedded Apps for our devices. This Framework contains:

• An App Boilerplate
• An App Builder
• CI workflows
• A test framework integrated in this CI, called Ragger
• A device simulator called Speculos

Want to know more?

Come talk to us on Discord.

App Boilerplate

An Boilerplate to test our Framework or to kickstart your Embedded App project. See how to build it and load it on a device in this section.

App Builder

A tool to build your application with our Docker image, so that it is always up to date with the latest standards and dependences. See how to use it in this section.

CI

In the App Boilerplate you will find a list of workflows to set up an efficient CI pipeline for your project.

Two of these workflows are a requirement to submit your embedded application:

• Build_and_functional_tests, which will build the app and run functional tests using the Ragger framework upon Speculos emulation
• Guidelines_enforcer, which calls a reusable workflow guidelines_enforcer developed by Ledger’s internal developer team

Ragger

A Python framework which aims at simplifying the test and overall automatic manipulation of applications running on Ledger devices. It is used by the App Boilerplate’s CI. You can read the full Ragger documentation here.

Speculos

A Ledger device simulator. It is used by the App Boilerplate’s CI. You can read the full Speculos documentation here.

---

Did you find this page helpful?

How would you improve this page for developers?

I am a developer.
Contributors will be chosen randomly to receive rewards. Check this box to send your email and participate.

Ledger collects your email address to send you rewards for your contribution to improve the Developer Portal documentation. Learn more about how we manage your data and your rights.

By providing your email address, you consent that Ledger may contact you for rewards delivery purposes. If you are part of the randomly selected contributors, we will send you an email to ask for your physical address and if necessary, ask you for additional information on the suggestion you made. Your information will only be available to Ledger and will be retained for no longer than 90 days. It may be transferred to non-European countries that ensure an adequate level of protection or under the standard contractual clauses adopted by the EU Commission.

Please note that you may withdraw your consent at any time, access your data and request their rectification or deletion. You may also request the limitation of the processing of your data. To exercise your rights or for any question on the processing of your data, please contact LEDGER’s Data Protection Officer here. If nevertheless you believe LEDGER did not adequately address your concerns and mishandled your data, you may lodge a complaint with the personal data protection authority of your country.

Requirements and Coding guidelines versions

← Previous

External Development

Next →