raspibolt_71_zap.md

layout	title	parent	nav_order	has_toc
default	Zap Desktop	Bonus Section	50	false

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 RaspiBolt 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 RaspiBolt 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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