LDK Node, Greenlight and Breez SDK

#8・June 29, 2023

In the last live coding session we've seen how to get a CLN node running within a few minutes using the bitcoin backend trustedcoin. No need to run a full bitcoin core node.

Some attendees tried to connect to this new created CLN node but couldn't because I forgot to open my port 9735.

If you expose your CLN node on that port you can connect to other nodes even if it is closed but nodes can't directly connect to you.

If you are using ufw as firewall, you can run the following command to open that port: 

$ sudo ufw allow 9735

In the next live we'll try:

  • to give a bit of history of the plugin system,

  • to present existing plugins (maintained or not) and

  • to present libraries that makes it easier to write plugins.

If you'd like to attend, you're are welcome.

Last week Lightning Dev Kit announced LDK Node.

LDK Node provides a straightforward interface and an integrated on-chain wallet, enabling users to quickly and easily set up a self-custodial Lightning node.

It is written in Rust but comes with binding for Swift, Kotlin, Python and Flutter.

If you want to go straight to the code, here it is:

https://github.com/lightningdevkit/ldk-node

Earlier this month, Blockstream open-sourced greenlight client repository and announced it in this post.

Greenlight is a non-custodial Lightning-as-a-Service (LaaS) for businesses, merchants, and Lightning apps. The users hold their keys, while Blockstream take care of everything else.

Greenlight is already used by Breez SDK.

Breez SDK enables mobile developers to integrate Lightning and bitcoin payments into their apps with a very shallow learning curve.

This is an end-to-end, non-custodial, drop-in solution powered by Greenlight, a built-in LSP, on-chain interoperability, third-party fiat on-ramps, and other services users and operators need.

If you want to see a demo of Breez SDK you can watch this talk where Jesse de Wit adds lightning payments in minutes to a Flutter app using Breez SDK.

And if you want to learn more about Greenlight and Breez SDK, you can watch Future Visions of Lightning, Greenlight & Breez SDK (SLP488) with Christian Decker and Roy Sheinfeld.

I hope you're having a good time in your Bitcoin Journey, See you in the next newsletter, Tony Aldon https://lnroom.live

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