Chapter 3: Personal Electrum Server – Fulcrum

Prerequisite

Chapter 1: Hardware selection, upgrade, and Ubuntu Server installation

Chapter 2: Installing, Configuring & Updating Bitcoin Core

1. Download the file

Go into your “home” directory and create the following folders

mkdir fulcrum mkdir fulcrum_db

Go to the Fulcrum Github release page https://github.com/cculianu/Fulcrum/releases and download the latest release

cd downloads wget https://github.com/cculianu/Fulcrum/releases/download/v1.9.1/Fulcrum-1.9.1-x86_64-linux-ub16.tar.gz wget https://github.com/cculianu/Fulcrum/releases/download/v1.9.1/Fulcrum-1.9.1-x86_64-linux-ub16.tar.gz.asc sha256sum --ignore-missing --check SHA256SUMS

Extract the file

tar xvf Fulcrum-1.9.1-x86_64-linux-ub16.tar.gz

Move the files to fulcrum folder

mv Fulcrum-1.9.1-x86_64-linux-ub16/* /home/<user>/fulcrum cd .. cd fulcrum

2. Creating the Key and Cert

Creating the keys

openssl req -newkey rsa:2048 -new -nodes -x509 -days 3650 -keyout key.pem -out cert.pem Generating a RSA private key

Press <enter> for all the defaults parameters. The files keys.perm and cert.perm should have been created in your fulcrum folder.

3. Configuration file

rename the config file

mv fulcrum-example-config.conf fulcrum.conf

Modify the config file

nano fulcrum.conf

Change the following in the config file:

Change path of the datadir: home/<username>/fulcrum_db
rpcuser: use the same one as the bitcoin.conf file
rpcpassword: use the one used for the rpcauthy while setting up the bitcoin.conf file
remove the # for the SSL= 0.0.0.0:50002
remove the # for the certificate and put correct path home/<username>/fulcrum/cert.pem
remove the # for the key and put correct path home/<username>/fulcrum/key.pem
remove the # for peering and change for peering=false
remove the # for fast-sync and change for what you are confortable fast-sync = 4000 (4g of ram)

CTRL-X, Y, ENTER

4.Creating the service file

Creating service file

sudo nano /etc/systemd/system/fulcrum.service

Paste de following in the file and replace <user> by your server username.

[Unit] Description=Fulcrum After=network.target [Service] ExecStart=/home/<user>/fulcrum/Fulcrum /home/<user>/fulcrum/fulcrum.conf User=<user> LimitNOFILE=8192 TimeoutStopSec=30min [Install] WantedBy=multi-user.target

CTRL+X, Y, Enter

***Start this service

sudo systemctl enable fulcrum.service sudo systemctl start fulcrum.service sudo systemctl status fulcrum.service

To see the log

journalctl -fu fulcrum.service

The next chapter will be to sync your node to your own wallet!