Getting started

In this section of the Developer Portal, you will find the resources to build, test and submit C and Rust apps, Ethereum plugins and Cloned coins apps, compatible with all Ledger devices (Ledger Nano S+, Ledger Nano X, Ledger Stax and Ledger Flex).

Reach an agreement with our team

1. Contact us and introduce your project

Fill in this form to introduce your project. We’ll get back to you to align on your device app development and its integration in Ledger Wallet. After meeting with our teams, you’ll be directed to one of the following paths.

2.a. Ledger Development

You can sign a contract with Ledger for development of your device app and full support of your blockchain in Ledger Wallet.

This option includes:

• Development of your device app with Clear Signing for transactions
• Integration into Ledger Wallet, including the features defined in the SOW and the relevant Ledger Wallet services
• Ongoing maintenance and updates of the integration
• Mandatory security audits for each device app update, managed within Ledger’s process
• Direct collaboration with Ledger’s engineering team throughout the project

2.b. Autonomous Development

If an agreement with Ledger is not feasible, you can still develop a device app on your own.

What to expect

• Every device app must pass a security audit before it can appear on the Ledger Wallet “My Ledger” app list.
• You will build a device app compatible with third-party wallets; users won’t be able to manage their assets in Ledger Wallet unless an agreement is signed later.

Security audit

Before publication, your app must go through a functional and security audit. The audit is performed by one of our approved partners, at your expense. Both partners follow Ledger specifications and deliver a full report including potential vulnerabilities.

Audit partners

When your device app is ready for audit, contact one of our partners:

• Kudelski IoT
• Quarkslab — contact them here

Agreement details

When contracting with an auditor, align on:

• Time — When the audit can start
• Cost — The audit is entirely at your expense
• Maintenance — Include a clause for updates or plan to sign a new contract for major updates. Otherwise, Ledger will not update your app and it may be delisted from the My Ledger app list if it becomes incompatible.

Tools and boilerplates

• To learn how to quickstart a project with the Ledger VS code extension, read this guide. The extension makes the environment set up, the app building, and the tests very easy.
• To start developing your project with the boilerplates, go in the How-to section in “Integration walkthroughs” and you will find the C Boilerplate, the Rust Boilerplate, the Ethereum plugin doc and the Cloned coins apps integration process.

Technical information

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