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Introducing Spark New Gui Implementation

Introducing Spark New Gui Implementation

noun \ ˈspärk \: a short bright flash of electricity between two points

Spark is a brand new web-based GUI, Electron app (for Linux, Windows, and macOS), and mobile app (for Android, and soon for iOS) from independent developer Nadav Igvi that uses c-lightning as its backend.

With Spark, bitcoins are easily spent and received over the Lightning Network with a simple interface. A user can now run their own fully validating Bitcoin node, their own c-lightningnode, and their own Spark GUI to use the Lightning Network as trustlessly as possible.

A quick demo of Spark’s user interface

Some of Spark’s features include:

LetsEncrypt integration:

Since Spark uses self-signed certificates by default when binding to an IP address other than localhost, web browsers will present a warning. Fortunately, Spark supports LetsEncrypt CA-signed certificates. All that is required is a registered domain.

To register a certificate with LetsEncrypt:

$ spark-wallet --host --letsencrypt

More information on LetsEncrypt integration can be found here.

Tor support:

Spark also has support for creating Tor Hidden Service v3 .onion addresses which have some advantages versus having to purchase a domain and setup port forwarding for clearnet usage.

.onion addresses are self-authenticating and are pinned to your server’s public key, and also serve to authenticate the user accessing Spark since access to the server is only possible if the user knows the .onion address.

To start Spark to run as a Tor Hidden Service v3, simply set --onion on the command line:

$ spark-wallet --onion

Spark will automatically install Tor when first running with --onion, and present the v3 address in the command line output.

Desktop Electron app:

The Spark Electron app can simply be downloaded here as an AppImage.deb.tar.gz,.zip, or Windows installer / portable, and executed, installed, or decompressed. The Electron app bundles the Spark server-side component, so the user only has to input connection details for their c-lightning instance.

The macOS Electron App and the Starblocks coffee shop

Mobile Android (Cordova) app:

First, download the .apk from here and install it on your device, then run it. A configured Spark server (see the prior section on installing Spark to be accessible remotely) is required for the Cordova app to work correctly.

When the Cordova app is first run, the user must first pair their device with the remotely-accessible Spark server. A quick way to do this is to run Spark with -Q, which will generate and print the access key and .onion address of your Spark server. The QR code can then be scanned by the Cordova app to make inputting the address and access key much easier.

The pairing QR for a Spark server running as a Hidden Service!

Once paired with a Spark server, a user can then transact bitcoins over the Lightning Network!

A Spark-to-Spark transaction!
The simplicity and flexibility of Spark allows it to be used on a variety of devices; from desktops to laptops, as well as mobile devices. Up until now, c-lightning users had to take to a terminal emulator to use Lightning. Now, those users can spend and receive bitcoins over the Lightning Network with the tap of a finger or a click of a mouse!

Full Medium article by @notgrubles here


Editor-in-Chief @Coindaily_co and Bitcoin enthusiast

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