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Using the Polkadot Ledger Application

Note: Because of required WebUSB support, Ledger wallets currently only work on Chromium-based browsers like Brave and Chrome.

The Polkadot Ledger application is compatible with both the Ledger Nano S and the Ledger Nano X devices. Ledger devices are hardware wallets that keep your secret secured on a physical device that does not expose it to your computer or the internet. It is strongly recommend to use a hardware wallet if you are managing a significant amount of funds.

The Polkadot application allows you to manage Polkadot's native token, the DOT. It supports most of the transaction types of the network (a notable exception is the "Batch" transaction from the Utility pallet).

Please check out our intro to Ledger video on Youtube for more information.

Requirements

Here is a list of what you will need before starting:

• A Ledger Nano S or a Ledger Nano X.
• The latest firmware installed (at the time of writing this is 1.6.1 on the Nano S, and 1.2.4-4 on the Nano X).
• Ledger Live is installed and at version 2.1 or newer (see settings -> about to find out if you're up to date).
• A web browser is installed that you can use to access Polkadot-JS Apps.

Installing the Ledger Application

Using Ledger Live

• Open the "Manager" tab in Ledger Live.
• Connect and unlock your Ledger device.
• If asked, allow the manager on your device by pressing both buttons on the YES screen.
• Find Polkadot in the app catalog and install it.

Please proceed to the usage instructions below.

Using the Developer Release

NOTE: These instructions are for development installation only. It is recommended to install the application from Ledger Live unless you know exactly what you're doing.

Instructions for downloading the prerelease binary from the GitHub releases are written in the README for the Polkadot Ledger application GitHub repository.

On the releases page you can download the shell script install_app.sh and then make it executable in your shell by typing the command chmod +x install_app.sh.

Using install_app.sh help command will show you the available options:

$ ./install_app.sh --help
Zondax Installer [Polkadot-1.2011.1] [Warning: use only for test/demo apps]
  load    - Load Polkadot app
  delete  - Delete Polkadot app
  version - Show Polkadot app version

Next, you must make sure your Ledger device is plugged in and unlocked and you're using the latest firmware (1.6.1 at the time of writing). If everything is prepared, then type ./install_app.sh load and accept the prompts on your Ledger device to install the application.

First it will prompt you to allow an unsafe manager - confirm this by switching the screen to the allow screen and pressing the corresponding buttons.

After some processing time, the screen of your device will update to say "Install app Polkadot". Navigate all the way to the right, verify the Identifier hash matches the one that is printed in your terminal. Click both buttons on "Perform Installation" to install the application. It will ask again for your Pin code and you should enter it in the device.

At the end of the process you should have the newly installed Polkadot application on the device.

Using on Polkadot-JS Apps

Loading Your Account

Polkadot-JS Apps already has an integration with the Ledger application so that your device will work with the browser interface after installation. The functionality is currently gated behind a feature setting that you will need to turn on.

In order to turn on the interoperability with the Polkadot Ledger application, go to the "Settings" tab in Polkadot-JS Apps. Find the option for attaching Ledger devices and switch the option from the default "Do not attach Ledger devices" to "Attach Ledger via WebUSB".

Click "Save" to keep your settings.

Now when you go to the "Accounts" tab you will see a new button that says "Add Ledger". Ensure that your Ledger device is unlocked and you have navigated into the Polkadot application, then click this button.

A popup will appear asking you to select an account and derivation path.

The first option lets you select an account. You can have multiple accounts on a single Ledger device. The second dropdown lets you pick a derivation path - think of it like a formula from which child accounts are generated. If in doubt, pick the first option for both. 0 / 0 is a good default.

Once you confirm your selection, depending on your browser and its security settings, you might need to confirm the USB connection through a popup like the one below when adding the Ledger device for the first time:

You should now be able to scroll down and find a new account on the page with the type "ledger".

You can now use this account to interact with Polkadot on Polkadot-JS Apps and it will prompt your ledger for confirmation when you initiate a transaction.

Confirming the Address on your Device

On the "Accounts" tab, find your Ledger-connected account. Click on the three vertical dots at the end of the row. This will open a new menu, here you can click the "Show address on hardware device" option to display the address on your device.

Here you can scroll through and make sure the address matches to what is displayed on Polkadot-JS Apps.

Checking the Balance of Your Account

There are a few methods to check the balance of your account. You can use Polkadot-JS Apps or you can use a block explorer like Polkascan.

Using Polkadot-JS Apps

Once you have your account loaded on the "Accounts" tab it should show a row with your Ledger account. At the far right of the row is located your account's DOT balance. If you expand the balance arrow, it will show details of your balance such as locks or reserved amounts.

Using a Block Explorer

You can also use a block explorer such as Polkascan or Subscan to check the DOT balance of your account. On these block explorers you can search for your account in the search box and click on it to reveal the details. It will show your DOT balance as well as details about your bonded or locked amounts.

Sending a Transfer

Instructions to send a transfer can be found on the balance transfer page.

Receiving a Transfer

In order to receive a transfer on the accounts stored on your Ledger device, you will need to provide the sender (i.e. the payer) with your address.

The easiest way to get your address is to click on the account name which will open a sidebar. Your address will be shown in this sidebar, along with some other information. Another method is just clicking on your account's avatar icon - this immediately copies your address to the clipboard.

Warning: before giving anyone your address, make sure it matches what's really on the Ledger by confirming the address on your device. Some malware will intercept clicks and clipboard requests and can change your copied value in-flight, so being extra vigilant around copy-paste operations makes sense.

Staking

Since Ledger does not support batch transactions, you must do two separate transactions when you want to stake using an account stored on a Ledger device.

• Go to the "Staking" tab found under the "Network" dropdown in the top navigation menu.
• Click the "Account Actions" pane in the inner navigation.
• Click "+ Stash" instead of "+ Nominator" or "+ Validator" (selecting the latter two will not work).
• Input the amount of tokens to bond and confirm the transaction.
• Confirm the transaction on the Ledger devivce.
• When the transaction is included you will see the newly bonded account in the "Account Actions" page.
• Select "Start Nominating" or "Start Validating" to start nominating or validating.
• Confirm the transaction on Apps and on the Ledger device.

Support

If you need support please send an email to [email protected] or visit our Support Page.