This guide details how to apply a transaction signature for Casa App using your Ledger Nano S or Ledger Nano X device.
First, create a transaction as normal by tapping "Send" from your keyset. Enter the amount you want to send, then input the address you're sending to, just like any other transaction.
When you begin signing the transaction with your hardware device, click, "Tap to add new signature," then tap "Send Email" on the next screen.
Next, click the email that Casa sends you from a laptop or desktop computer. At this point, you will need to plug in your Ledger device, unlock it using your PIN, and open the "Bitcoin" application within the Ledger device.
Once you've plugged in your Ledger device, unlocked it with the PIN, and have opened up the bitcoin application on the device, follow the steps in your web browser (we recommend Chrome).
In the browser, select your Ledger device, click "Continue" at the relevant screens.
When your screen says "Waiting on Ledger," you must approve the signature from the actual device by reviewing the transaction details and pressing both top buttons on the Ledger simultaneously to give it the final confirmation. Once you do this, the signature is applied.
Once you apply the signature from your Ledger device, you can go back to the mobile app, apply another signature if needed, and send the transaction so it broadcasts to the network.
Tada! You've signed a transaction using your Ledger device.