Build Script Details

Published: June 2024 | Last updated: April 2025

The Github Repository for the Lynx ElectrumX build script is located here.

The build script relies on a few dependencies and ties them together in a single script that completes the tedious task of building the Electrum. The scripts include;

• LynxCI - the script to create a Lynx node.

• Electrum Installer - from our friends at Mad Cat Mining - who generously upgraded the upstream version to work with Debian 11 and the latest versions of Python for Debian 11.

• Certbot - to complete the task of ensuring that all connections to the Electrum remain encrypted.

• Shell scripting - the auto-configuration of Electrum configuration files, Lynx configurations files, and local firewall settings on the node.

The complete documentation for ElectrumX can be found here. All Lynx ElectrumX servers enforce secure traffic via ports 50002 and 50004. Non-secure Electrum ports are blocked.

Reference Configuration Files

The following files are automatically configured in the build script, but sometimes, a copy of a configuration file is helpful. Below is a template of your local /etc/electrumx.conf file.

# This script is for electrum.getlynx.io. Be sure to update your domain below.
# File location: /etc/electrumx.conf

DB_DIRECTORY=/db
DAEMON_URL=http://{localLynxRPCUsername}:{localLynxRPCPassword}@127.0.0.1:9332/
COIN=Lynx
DB_ENGINE=rocksdb
COST_SOFT_LIMIT=0
COST_HARD_LIMIT=0
SSL_CERTFILE=/etc/letsencrypt/live/electrum5.getlynx.io/fullchain.pem
SSL_KEYFILE=/etc/letsencrypt/live/electrum5.getlynx.io/privkey.pem
SERVICES=ssl://:50002,wss://:50004,rpc://
REPORT_SERVICES=wss://electrum5.getlynx.io:50004,ssl://electrum5.getlynx.io:50002

The following Class should be used to correctly integrate your Electrum node with Lynx.

# For Debian 11
# File location: /usr/local/lib/python3.9/dist-packages/electrumx/lib/coins.py

# https://docs.getlynx.io/electrumx/
class Lynx(Coin):
	NAME = "Lynx"
	SHORTNAME = "LYNX"
	NET = "mainnet"
	P2PKH_VERBYTE = bytes.fromhex("2d")
	P2SH_VERBYTES = (bytes.fromhex("16"),)
	WIF_BYTE = bytes.fromhex("ad")
	GENESIS_HASH = ('984b30fc9bb5e5ff424ad7f4ec193053'
			'8a7b14a2d93e58ad7976c23154ea4a76')
	DESERIALIZER = lib_tx.DeserializerSegWit
	TX_COUNT = 1
	TX_COUNT_HEIGHT = 1
	TX_PER_BLOCK = 1
	RPC_PORT = 9332
	PEER_DEFAULT_PORTS = {'t': '50004', 's': '50002'}
	PEERS = [
		'electrum5.getlynx.io s t',
		'electrum6.getlynx.io s t',
		'electrum7.getlynx.io s t',
		'electrum8.getlynx.io s t',
		'electrum9.getlynx.io s t',
	]
	REORG_LIMIT = 5000