I've made a tutorial for Ledger Nano S with Electrum
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Tutorial: linking Ledger wallet Nano S to Byteball account via signing a message with Electrum

Step 1: Install and configure Electrum wallet

- Download and install latest version of Electrum:  electrum.org/#download
- Select Standard wallet



- Connect your Nano S to your computer, enter the PIN and select the Bitcoin app
- Then select "Use a hardware device"



- Your Nano S is detected



- Press Next, and select your Account Number. If you are not sure, leave the field with 0, otherwise enter the index of the account you want to import.



- Click on Next, and Electrum will sync your account. Depending on your connection and the server, it may take from a few minutes to half an hour.
- Once the sync process is finished, you can use Electrum normally.


Step 2: Get a NEW bitcoin address

On Electrum:
- Click on "Receive" tab
- Copy your "Receiving address"




Step 3: Move your bitcoins to your NEW address

On Electrum:
- Click on "Send" tab
- Paste your receiving address (from step 2) into "Pay to" field



- Enter the amount you want to transfer (you can send the maximum possible amount by pressing the "Max" button)
- Select the Fee amount
- Click on "Send"
- Validate the transaction on your device (Nano S)




Step 4: Install and launch Byteball wallet

- Download Byteball wallet from byteball.org (make sure it is the LIVENET version)
- Install Byteball wallet
- Open Byteball wallet
- Click on the link provided by byteball.org to launch the Transition Bot




- Click on "Insert my address" then on "Send"
- Enter your bitcoin address (the one from Step 2) and click on "Send"




Step 5: Sign a message (your Byteball address) with your Bitcoin address

On Electrum:
- Click on "Tools" --> "Sign/verify message"



- Paste your Byteball address (from step 4) into the "Message" field
- Paste your Bitcoin address (from step 2) into the "Address" field
- Click on "Sign"



- Validate the signature on your device (Nano S)
- The signature should now appear on the "Signature" field, copy it


Step 6: Link your Byteball address with your bitcoin address

- In Byteball wallet, paste the signature (from step 5) and click on "Send"
- You should get a confirmation from the Transition Bot with your current balance on your bitcoin address



Note: If you spend some of your bitcoins, you will have to repeat Step 3, so that your bitcoins are always on the linked bitcoin address

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BTC: 1PCFYMwCb4F2M2zezY1gAooKHTTtrvX1e2