Re: >> OpenSUSE 15.3 walkthrough: bitcoind + electrs + c-lightning + RTL <<

electrs
Since one of the main benefits of running a full node is privacy during transaction & address lookup, an Electrum server is needed. Otherwise you'd have to query using Bitcoin Core all the time and can't just use your mobile and desktop applications for that.

[1] Install dependencies, make sure you're logged into your sudoer account and not in bitcoin.

Code:

sudo zypper install clang cargo rust tor

[2] Download and build electrs as bitcoin. It took my machine around 10 minutes.

Code:

su - bitcoin
git clone https://github.com/romanz/electrs
cd electrs
cargo build --locked --release --no-default-features
mkdir database

[3] Create electrs config file
[code]
nano electrs.toml

[4] Enter the following:

Code:

cookie_file = "/home/bitcoin/.bitcoin/.cookie"

# The listening RPC address of bitcoind, port is usually 8332
daemon_rpc_addr = "127.0.0.1:8332"

# The listening P2P address of bitcoind, port is usually 8333
daemon_p2p_addr = "127.0.0.1:8333"

# Directory where the index should be stored. It should have at least 70GB of free space.
db_dir = "/home/bitcoin/electrs/database"

# bitcoin means mainnet. Don't set to anything else unless you're a developer.
network = "bitcoin"

# How much information about internal workings should electrs print. Increase before reporting a bug.
verbose = 2

[5] Log back out into your sudo account, and open the Tor config file.

Code:

exit
sudo nano /etc/tor/torrc

[6] Add the following contents, preferably in the right section (somewhere where there's HiddenServiceDir stuff commented out).

Code:

HiddenServiceDir /var/lib/tor/electrs_hidden_service/
HiddenServiceVersion 3
HiddenServicePort 50001 127.0.0.1:50001

ExitPolicy reject *:* # no exits allowed

[7] Start up Tor and fetch your electrs Tor hostname. The hostname can then be entered in wallets like Wasabi and BlueWallet settings.

Code:

sudo systemctl restart tor
sudo cat /var/lib/tor/electrs_hidden_service/hostname

[8] Create a service so electrs starts on startup

Code:

sudo nano /usr/lib/systemd/system/electrs.service

[9] Enter this information

Code:

[Unit]
Description=Electrs
After=bitcoind.service

[Service]
WorkingDirectory=/home/bitcoin/electrs
ExecStart=/home/bitcoin/electrs/target/release/electrs
User=bitcoin
Group=users
Type=simple
KillMode=process
TimeoutSec=60
Restart=always
RestartSec=60

[Install]
WantedBy=multi-user.target

[10] Start the service

Code:

sudo systemctl enable electrs.service
sudo service electrs start

[11] Check that it's running. This should return the electrs version.

Code:

echo '{"jsonrpc": "2.0", "method": "server.version", "params": ["", "1.4"], "id": 0}' | netcat 127.0.0.1 50001

[/code]