Zap Desktop

Bonus guide: Zap Desktop Lightning Wallet

Difficulty: easy

The desktop app Zap (https://github.com/LN-Zap/zap-desktop) is a cross platform Lightning Network wallet focused on user experience and ease of use.

Download Zap for your operating sytem: https://github.com/LN-Zap/zap-desktop/releases
Install instructions: https://github.com/LN-Zap/zap-desktop#install

Preparation on the Pi

Allow connections to the RaspiNail from your own network (the netmask /16 restricts access to all computers with an ip address of 192.168..).
```
$ sudo nano /home/bitcoin/.lnd/lnd.conf
```
Add the following lines to the section [Application Options]:
```
tlsextraip=192.168.0.0/16
rpclisten=0.0.0.0:10009
```

Delete the tls.cert file and restart LND to recreate it.

$ sudo rm /home/bitcoin/.lnd/tls.*
$ sudo systemctl restart lnd

Copy the new tls.cert to the user “admin”.

$ sudo cp /home/bitcoin/.lnd/tls.cert /home/admin/.lnd

Unlock the LND wallet.
```
$ lncli unlock
```

Allow the UFW firewall to listen on 10009 from the LAN, restart and check it.

$ sudo ufw allow from 192.168.0.0/16 to any port 10009 comment 'allow LND grpc from local LAN'
$ sudo ufw enable 
$ sudo ufw status

Connect Zap Desktop with a Connection String

We will connect Zap to the RaspiNail using a connection string that includes the connection and authentication information. This option is available starting with Zap 0.4.0 beta.

On the Pi:

Install LndConnect:

$ cd /tmp
$ wget https://github.com/LN-Zap/lndconnect/releases/download/v0.1.0/lndconnect-linux-armv7-v0.1.0.tar.gz
$ sudo tar -xvf lndconnect-linux-armv7-v0.1.0.tar.gz --strip=1 -C /usr/local/bin

Generate the Connection String
```
$ sudo lndconnect --lnddir=/home/admin/.lnd -i -j
```
Copy the resulting text starting with lndconnect://...

Configure Zap:

Start Zap on your desktop
Create a new wallet
Choose the Connect to your node option
Paste the Connection String generated with LndConnect
Confirm and Connect
Confirm the settings on the following screen and you are done!

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