Hardware keys - Connect your device, choose "Cosign with hardware device," and click "Next".Paste the Mobile key's Ypub from the file or encrypted chat and click "Next".Mobile key (if applicable) - Choose "Enter cosigner key" and click "Next".Paste the Casa Recovery Key's Ypub from the file or encrypted chat and click "Next" ( Note: ensure there are no spaces at the end of the key or Electrum will not recognize it).Casa Recovery Key - choose "Use a master key" and click "Next".Select the appropriate number of signatures (2 for the 3-key vault, 3 for the 5-key or 6-key vault).Select the appropriate number of cosigners (3 for the 3-key vault, 5 for the 5-key vault, 6 for the 6-key vault).This time, you'll be completing the process manually. The wallet setup process mimics the steps you took to set up your Casa account. Once you've verified your download, it's time to run Electrum. This location should have the Electrum download, the signature file, and the developer's key.Install GPG: Download and run installer.This location should have the Electrum download, the signature file, and the developer’s key.This location should have the Electrum download, the signature file, and the developers key.You can download Electrumfrom their site, and make sure you get the appropriate signature file and the developer's pubkey, too. We also do NOT recommend trying to copy them out manually.īitcoiners have been targeted in attacksthat use a fake version of Electrum, so we strongly recommend you verify the file's authenticity using GPG signatures. We do NOT recommend emailing the keys to yourself, since you risk exposing your account’s addresses to eavesdroppers. Encrypted messaging services are a great option, or you can physically transfer the data via a USB drive. Once you've gathered the public key and derivation path, transfer the data to the computer where you're setting up the watch-only wallet. Repeat steps 9-12 for any remaining hardware keys.Tap the derivation path to copy it, will look something like m/49/0/0.Tap "Hardware Key" (or "Home Key," "Office Key," or "Safe Key" if you have a 5-key vault).If applicable, repeat steps 3-7 for the Mobile Key.Save it locally, or send it to yourself using an encrypted messenger. Tap the Public Key beginning with "Ypub" to copy the key.Tap the key icon beneath the vault you want to watch.This step will walk you through the process to export the mobile key and Casa Recovery Key from the Casa app. To build your watch-only wallet, you will need to get the extended public key for each one of your hardware devices. Just collect the public keys from your wallet provider and begin at Step 2.Ī video tutorial here walks through the following steps:ġ: Export public keys and derivation paths □️ A note for non-Casa customers: This process will work with any multisig wallet. (Optional) Encrypted messaging app running on both devices.Android or iOS device running the Casa app.We like Ubuntu or PureOS, but Mac and Windows work just fine. Laptop or desktop that can run Electrum.See Mind the bitcoin address gap for more details on the gap limit. If this happens, you must make deposits of any amount to the empty addresses within the "gap." This is due to what's known as the "gap limit" issue where some wallets, ours included, do not automatically scan past unused addresses to determine a user's balance or transaction history. "Skipping" addresses in your keyset and depositing to later derived addresses may cause the deposit not to appear in your Casa app. While Electrum will display your unused derived "future" addresses, you should only deposit funds to either the current address that the Casa app is showing you, or previous addresses that you have deposited to in your Casa vault. To avoid this risk entirely, as a best practice we also recommend running your own Electrum server ( instructions here). It's important to make sure you always connect with a VPN to make it harder to associate your IP address with your BTC addresses. In the past, we have seen reports that blockchain analysis firms have run Electrum full nodes. □ Important Notes: Unless you're running your own Electrum server, it is possible that by following the steps below, your total BTC balance could be gleaned by the third-party node that your Electrum client app is connecting to. We also like that you never need to load your private keys into Electrum. Electrum is fully open source, and one of the best-maintained and most fully-featured projects in bitcoin.
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