LN payment processing device (aka "The Box")

[nolim1t]

Just a rehash from our Keep document

Description

We build a device that runs Bitcoin/Tor(?)/LN nodes and presents a UI to select a product, connect to it (LN-connstring), displays QR code of an invoice to pay, and shows payment confirmation.

Needed:

• Raspberry Pi - @meeDamian brings 2-3 (@AnotherDroog can bring a couple more if needed)
• Raspberry Pi Power Brick - @meeDamian can bring 1, would be good to have two more (@AnotherDroog can bring a couple more)
• display - Damian brings e-paper one (https://www.waveshare.com/2.7inch-e-Paper-HAT-B.htm ) - any other welcome too :)
• micro SD storage cards - @meeDamian will same # as RBPs
• USB sticks for RAM - @meeDamian will bring
• HDD with 250GB+ - if we want to run the node on a mainnet too, I (@meeDamian ) can (probably) try bringing a copy of a full blockchain, but I don't have a spare HDD I can commit to it, so anyone is welcome to bring one (@AnotherDroog has a spare USB HDD and can populate with blockchain)

Comments

• The raspberry Pi powered ln payment processor sounds like a cool idea 💡 @nolim1t

[nolim1t]

Also needs to be able to connect to different exchanges to fetch data. I've got some node.js libraries

[meeDamian]

@nolim1t I think it would be waaaay beyond the scope of this project. Let's keep it simple:

• interface displays available products,
• upon confirmation displays a LN invoice,
• upon successful payment displays success screen,
• upon invoice expiry/cancellation displays failure screen.

Once we have that we can try to hook it up with some arduino board (as per #4) to perform some "motor functions" - unlocking fridge, etc, etc see

[meeDamian]

We already got the e-paper display to work, and the RBPs on which will be doing the project are already being cooked ^^

[nolim1t]

thats awesome. whats the code like to display stuff on epaper?

I assume theres some sort of API there

[meeDamian]

I'll post the exact procedure to get it working later tomorrow. The setup procedure is rather complex with many steps, but the actual python code to show it is trivially short.

[meeDamian]

I'm going to be documenting RBP pre-setup for on-the-event reference. @AnotherDroog feel free to follow the same instructions and/or tell me about all issues that arise :).

I'll be setting up a

First step is pretty much just following all of my 3 guides posted:

• https://medium.com/@meeDamian/bitcoin-full-node-on-rbp3-revised-88bb7c8ef1d1
• https://medium.com/@meeDamian/bitcoin-through-tor-on-rbp3-12d38a1506f
• https://medium.com/@meeDamian/c-lightning-node-on-rbp3-b950660fb835

Rest, I'll be posting as I go 😁.

[nolim1t]

We should try to get "The Box" on docker (or another orchestration tool - I do like docker though because its platform independent for dev purposes) eventually.

[AnotherDroog]

Status update for those who weren't at the meetup:

[AnotherDroog]

This is largely duplicate of #14